MCQ 11 Mark
For a common emitter configuration, if 'α' and 'β' have their usual meanings, the correct relationship between 'α' and 'β' is ______.
- ✓
$\frac{1}{\alpha}=\frac{1}{\beta}+1$
- B
$\alpha=\frac{\beta}{1-\beta}$
- C
$\alpha=\frac{\beta^2}{1+\beta^2}$
- D
$\alpha=\frac{1-\beta}{\beta}$
AnswerCorrect option: A. $\frac{1}{\alpha}=\frac{1}{\beta}+1$
View full question & answer→MCQ 21 Mark
Which of the following regions of a transistors are, respectively, heavily dopped and lightly dopped?
MCQ 31 Mark
In Bohr model$,$ speed of electron in nth orbit of hydrogen atom is $........ \ (b =$ Planck's constant$, n =$ principal quantum number$, \in _0$ is the permittivity of free space$, e =$ electronic charge$)$
- ✓
$\frac{ e ^2}{2 \epsilon_0 hn }$
- B
$\frac{ e ^2}{\epsilon_0 hn }$
- C
$\frac{ e }{2 \in_0 hn }$
- D
$\frac{ e }{\epsilon_0 hn }$
AnswerCorrect option: A. $\frac{ e ^2}{2 \epsilon_0 hn }$
$\frac{ e ^2}{2 \epsilon_0 hn }$
View full question & answer→MCQ 41 Mark
An electron of mass $'m\ '$ is rotating in first Bohr orbit of radius $'r\ '$ in hydrogen atom. The orbital acceleration of the electron in first orbit $(h =$ Planck's constant$)$.
AnswerCorrect option: A. $h^2/4\pi ^2m^2r^2$
$h^2/4\pi ^2m^2r^2$
View full question & answer→MCQ 51 Mark
When the electron in hydrogen atom jumps from fourth Bohr orbit to second Bohr orbit, one gets the ______.
- ✓
second line of Balmer series
- B
second line of Paschen series
- C
first line of Balmer series
- D
first line of fund series
AnswerCorrect option: A. second line of Balmer series
View full question & answer→MCQ 61 Mark
The work function of a substance is $4.0 \ eV$. The longest wavelength of light that can cause photo$-$emission from this substance is approximately $(h = 6.63 \times 10^{-34} Js)[1eV = 1.6 \times 10^{-19} J]$
- A
$400 \ nm$
- ✓
$310 \ nm$
- C
$540\ nm$
- D
$220 \ nm$
AnswerCorrect option: B. $310 \ nm$
$310 \ nm$
View full question & answer→MCQ 71 Mark
Light of different frequencies, whose photons have energies 3 eV and 18 eV respectively, successively illuminate a metal of work function 2 eV. The ratio of the maximum speeds of the emitted electrons will be ______.
MCQ 81 Mark
A metal surface is illuminated by light of given intensity and frequency to cause photoemission. If the intensity of illumination is reduced to one-fourth of its original value then the maximum KE of the emitted photoelectrons would be ______.
- ✓
- B
four times the original value
- C
- D
one-fourth of the original value
View full question & answer→MCQ 91 Mark
$\text{L-C-R}$ series circuit contains a resistance of $10 \Omega $ and self$-$inductance $0.4 H$ connected in series with variable capacitor across $60 V$ and $50\ Hz$ supply. The value of capacity at resonance will be $\pi ^2 = 10.$
- A
$24\ \mu F$
- B
$26\ \mu F$
- C
$22 \ \mu F$
- ✓
$25\ \mu F$
AnswerCorrect option: D. $25\ \mu F$
$25\ \mu F$
View full question & answer→MCQ 101 Mark
A coil of radius 'r' is placed on another coil (whose radius is 'R' and current flowing through it is changing) so that their centres coincide. (R>>r) if both the coils are coplanar then the mutual inductance between them is proportional to ______.
- ✓
$\frac{ r ^2}{ R }$
- B
$\frac{ R }{ r }$
- C
$\frac{ r }{ R }$
- D
$\frac{ R }{ r ^2}$
AnswerCorrect option: A. $\frac{ r ^2}{ R }$
View full question & answer→MCQ 111 Mark
An alternating current of frequency 200 rad/s and peak value 1 A is applied to the primary of a transformer. If the coefficient of mutual induction between the primary and the secondary is 1.5H, then the voltage induced in the secondary will be approximately (π = 2217)
MCQ 121 Mark
If a magnetic field is applied to a liquid in one arm of a narrow U-tube, the liquid level in that arm is lowered. The liquid in U-tube arm is ______.
MCQ 131 Mark
Magnetic material can be easily magnetized if magnetic susceptibility is ______.
MCQ 141 Mark
The magnetization of bar magnet of length $5 \ cm,$ cross$-$sectional area $2 \ cm^2$ and net magnetic moment $1 \ Am^2$ is $.........$
- A
$2 \times 10^5 A/m$
- B
$3 \times 10^5 A/m$
- C
$4 \times 10^5 A/m$
- ✓
$1 \times 10^5 A/m$
AnswerCorrect option: D. $1 \times 10^5 A/m$
$1 \times 10^5 A/m$
View full question & answer→MCQ 151 Mark
The magnitude of the magnetic induction at a point on the axis at a large distance (r) from the centre of a circular coil of 'n' turns and area 'A' carrying current (l) is given by ______.
- A
$B _{ axis }=\frac{\mu_0}{4 \pi} \cdot \frac{ nlA }{ r ^3}$
- ✓
$B _{\text {axis }}=\frac{\mu_0}{4 \pi} \cdot \frac{2 nlA }{ r ^3}$
- C
$B _{\text {axis }}=\frac{\mu_0}{4 \pi} \cdot \frac{ nA }{ Ir ^3}$
- D
$B _{\text {axis }}=\frac{\mu_0}{4 \pi} \cdot \frac{2 nl }{ Ar ^3}$
AnswerCorrect option: B. $B _{\text {axis }}=\frac{\mu_0}{4 \pi} \cdot \frac{2 nlA }{ r ^3}$
View full question & answer→MCQ 161 Mark
A proton enters into a magnetic field of induction $1.732 T$, with a velocity of $10^7 m / s$ at an angle $60^{\circ}$ to the field. The force acting on the proton is e $=1.6 \times 10^{-19} C , \sin 60^{\circ}=\cos 30^{\circ}=\frac{\sqrt{3}}{2}$
- A
$3.2 \times 10^{-12} N$
- ✓
$2.4 \times 10^{-12} N$
- C
$4.0 \times 10^{-12} N$
- D
$1.6 \times 10^{-12} N$
AnswerCorrect option: B. $2.4 \times 10^{-12} N$
$2.4 \times 10^{-12} N$
View full question & answer→MCQ 171 Mark
Figure show the circular coil carrying current I kept very close but not touching at a point. A on a straight conductor carrying the same current l. The magnitude of magnetic induction at the centre of the circular coil will be.
MCQ 181 Mark
The potential difference between the points A and B in the electric circuit shown is ______.
- A
- B
$\frac{1}{3} V$
- C
$\frac{1}{3} V$
- ✓
$\frac{4}{5} V$
AnswerCorrect option: D. $\frac{4}{5} V$
View full question & answer→MCQ 191 Mark
Which of the following is the dimensional formula for electric polarisation?
AnswerCorrect option: C. $[M^0 L^{-2} T^1 l^1]$
$[M^0 L^{-2} T^1 l^1]$
View full question & answer→MCQ 201 Mark
In air, a charged soap bubble of radius 'R' breaks into 27 small soap bubbles of equal radius 'r '. Then the ratio of mechanical force acting per unit area of big soap bubble to that of a small soap bubble is ______.
- A
$\frac{1}{81}$
- B
$\frac{9}{1}$
- ✓
$\frac{1}{3}$
- D
$\frac{3}{1}$
AnswerCorrect option: C. $\frac{1}{3}$
View full question & answer→MCQ 211 Mark
A particle of mass 'm' having charge 'q' is held at rest in uniform electric field of intensity 'E'. When it is released, the kinetic energy attained by it after covering a distance 'y' will be ______.
MCQ 221 Mark
A capacitor of capacitance $'C_1\ '$ is charged upto potential $'\ V\ '$ and is then disconnected from the battery. It is then connected to uncharged capacitor, in parallel, whose capacitance is $'C_2\ '$. The potential difference across each capacitor is $........$
- ✓
$\frac{\text { mqy }}{E_1}$
- B
$\frac{ C _1+ C _2}{ C _1 V }$
- C
$\frac{ C _2 V }{ C _1+ C _2}$
- D
$\frac{ C _1+ C _2}{ C _2 V }$
AnswerCorrect option: A. $\frac{\text { mqy }}{E_1}$
$\frac{\text { mqy }}{E_1}$
View full question & answer→MCQ 231 Mark
If the two slits in Young's double slit experiment have width ratio 9 : 1, the ratio of maximum to minimum intensity in the interference pattern is ______.
MCQ 241 Mark
The phenomenon of interference is based on ______.
MCQ 251 Mark
Light of wavelength 'λ' is incident on a single slit of width 'a' and the distance between slit and screen is 'D'. In diffraction pattern, if slit width is equal to the width of the central maximum then 'D' is equal to ______.
AnswerCorrect option: C. $\frac{ a ^2}{2 \lambda}$
View full question & answer→MCQ 261 Mark
A pipe open at both ends and a pipe closed at one end have same length. The ratio of frequencies of their $p^{th}$ overtone is $.......$
- ✓
$\frac{2(p+1)}{2 p+1}$
- B
$\frac{p+1}{2 p}$
- C
$\frac{p+1}{2 p+1}$
- D
$\frac{p}{2 p+1}$
AnswerCorrect option: A. $\frac{2(p+1)}{2 p+1}$
$\frac{2(p+1)}{2 p+1}$
View full question & answer→MCQ 271 Mark
A stretched wire of length 260 cm is set into vibrations. It is divided into three segments whose frequencies are in the ratio 2 : 3 : 4. Their lengths must be ______.
MCQ 281 Mark
A set of 25 tuning forks is arranged in order of decreasing frequencies. Each fork produces 3 beats with succeeding one. If the first fork is octave of last, then the frequency of 1st and 15th fork in Hz is ______.
MCQ 291 Mark
The ratio of kinetic energy to the potential energy of a particle executing S.H.M. at a distance equal to (1/3)rd of its amplitude is ______.
MCQ 301 Mark
A person measures a time period of a simple pendulum inside a stationary lift and finds it to be $T$. If the lift starts accelerating upwards with an acceleration $\left(\frac{ g }{3}\right)$, the time period of the pendulum will be
AnswerCorrect option: A. $\frac{p}{2 p+1} \frac{p}{2 p+1}$
View full question & answer→MCQ 311 Mark
Two pendulums begin to swing simultaneously. The first pendulum makes nine full oscillations when the other makes seven. The ratio of the lengths of the two pendulums is ______.
- A
$\frac{64}{81}$
- B
$\frac{7}{9}$
- C
$\frac{8}{9}$
- ✓
$\frac{49}{81}$
AnswerCorrect option: D. $\frac{49}{81}$
View full question & answer→MCQ 321 Mark
If \alpha is the coefficient of performance of a refrigerator and $'Q_1\ '$ is heat released to the hot reservoir, then the heat extracted from the cold reservoir $'Q_2\ '$ is $.....$
- A
$\frac{\alpha-1}{\alpha} Q _1$
- B
$\frac{\alpha Q _1}{\alpha-1}$
- C
$\frac{1+\alpha}{\alpha} Q _1$
- ✓
$\frac{\alpha Q _1}{1+\alpha}$
AnswerCorrect option: D. $\frac{\alpha Q _1}{1+\alpha}$
$\frac{\alpha Q _1}{1+\alpha}$
View full question & answer→MCQ 331 Mark
A perfect gas of $'N\ '$ molecules, each of mass $'m\ ',$ moving with velocities $'C_1', 'C_2', ...... .'C_N\ '$ is enclosed in a cubical vessel of volume $'V\ '.$ The pressure exerted by the gas on the walls of the vessel is $.......... ('p' =$ density of gas $)$
- ✓
$\frac{1}{3} \rho \overline{ C }^2$
- B
$\frac{1}{3} \frac{ mN }{ V } C _{ RMS }$
- C
$\frac{1}{3} \frac{ m }{ V } C _{ RMS }^2$
- D
$\frac{1}{2} \rho \overline{ C }^2$
AnswerCorrect option: A. $\frac{1}{3} \rho \overline{ C }^2$
$\frac{1}{3} \rho \overline{ C }^2$
View full question & answer→MCQ 341 Mark
The rms speed of oxygen molecule in a gas is u, If the temperature is doubled and the molecules dissociates into two atoms, the rms speed will be ______.
MCQ 351 Mark
A capillary tube is vertically immersed in water, water raises upto height ' $h_1{ }^{\prime}$. When the whole arrangement is taken upto depth ' $d$ ' in a mine, the water level rises upto height ' $h_2$ '. The ratio of $\frac{h_1}{h_2}$ is . ( $R=$ radius of earth)
- A
$\left(1-\frac{2 D}{R}\right)$
- B
$\left(1+\frac{2 D }{ R }\right)$
- ✓
$\left(1-\frac{ d }{ R }\right)$
- D
$\left(1+\frac{ d }{ R }\right)$
AnswerCorrect option: C. $\left(1-\frac{ d }{ R }\right)$
View full question & answer→MCQ 361 Mark
A molecule of water on the surface experiences a net ______.
- A
upward resultant unbalanced cohesive force
- B
upward resultant unbalanced adhesive force
- ✓
downward resultant unbalanced cohesive force
- D
downward resultant unbalanced adhesive force
AnswerCorrect option: C. downward resultant unbalanced cohesive force
View full question & answer→MCQ 371 Mark
In hydraulic press, the diameters of piston in smaller cylinder and larger cylinder are $'d_1\ '$ and $'d_2\ '$ respectively. If $'F_1\ '$ is the force applied on smaller piston, the force $'F_2\ '$ on the larger piston is $.......$
- A
$F _2=\left(\frac{ d _1}{ d _2}\right)^2 \frac{1}{ F _1}$
- B
$F _2=\left(\frac{ d _1}{ d _2}\right)^2 F _1$
- C
$F _2=\left(\frac{ d _2}{ d _1}\right)^2 \frac{1}{ F _1}$
- ✓
$F _2=\left(\frac{ d _2}{ d _1}\right)^2 F _1$
AnswerCorrect option: D. $F _2=\left(\frac{ d _2}{ d _1}\right)^2 F _1$
$F _2=\left(\frac{ d _2}{ d _1}\right)^2 F _1$
View full question & answer→MCQ 381 Mark
Earth revolves round the sun in a circular orbit of radius $'R\ '.$ The angular momentum of the revolving earth is directly proprtional to $.......$
- A
$R^2$
- B
$R^3$
- C
$R$
- ✓
$\sqrt{ R }$
AnswerCorrect option: D. $\sqrt{ R }$
$\sqrt{ R }$
View full question & answer→MCQ 391 Mark
A wheel of moment of inertia $2 \ kg\ m^2$ is rotating at a speed of $25 \ rad/s$. Due to friction on the axis, it comes to rest in $10$ minutes. Total work done by friction is $.......$
- ✓
$625 J$
- B
$50 J$
- C
$25 J$
- D
$600 J$
AnswerCorrect option: A. $625 J$
$625 J$
View full question & answer→MCQ 401 Mark
When a $12000$ joule of work is done on a flywheel, its frequency of rotation increases from $10 \ Hz$ to $20 \ Hz.$ The moment of inertia of flywheel about its axis of rotation is $ ......... (\pi ^2 = 10)$
- A
$1 \ kgm^2$
- ✓
$2 \ kgm^2$
- C
$1.5 \ kgm^2$
- D
$1.688 \ kgm^2$
AnswerCorrect option: B. $2 \ kgm^2$
$2 \ kgm^2$
View full question & answer→MCQ 411 Mark
Assuming that the junction diode is ideal, the current in the arrangement shown in
MCQ 421 Mark
The equiconvex lens has a focal length 'f'. If the lens is cut along the line perpendicular to principal axis and passing through the pole, what will be the focal length of any half part?
- A
- B
$\frac{ f }{2}$
- ✓
- D
$\frac{3 f }{2}$
View full question & answer→MCQ 431 Mark
Which one of the following is $\text{NOT}$ the correct formula for refractive index of glass $w.r.t.$ air $(_a\mu _g) (i =$ angle of incidence$, r =$ angle of refraction$)$
- ✓
$a \mu g =\frac{\lambda_{\text {air }}}{\lambda_{\text {glass }}}$
- B
$a \mu g =\frac{\lambda_{\text {glass }}}{\lambda_{\text {air }}}$
- C
$a \mu g=\frac{\sin i}{\sin r}$
- D
$a \mu g=\frac{V_{\text {glass }}}{V_{\text {air }}}$
AnswerCorrect option: A. $a \mu g =\frac{\lambda_{\text {air }}}{\lambda_{\text {glass }}}$
$a \mu g =\frac{\lambda_{\text {air }}}{\lambda_{\text {glass }}}$
View full question & answer→MCQ 441 Mark
An observer moves towards a stationary source of sound with a velocity one-fifth of the velocity of sound. The percentage increase in the apparent frequency heard by the observer will be ______.
MCQ 451 Mark
A hot body at a temperature $'\ T\ '$ is kept in a surrounding of temperature $'\ T_0\ '$. It takes time $'\ t_1\ '$ to cool from $'\ T\ '$ to $'\ T_2\ ',$ time $t_2$ to cool from $'\ T_2\ '$ to $'\ T_3\ '$ and time $'\ t_3\ '$ to cool from $'\ T_3\ '$ to $'\ T_4\ '$. If $(T - T_2) = (T_2 - T_3) = (T_3 - T_4),$ then $......$
- A
$t_1 > t_2 > t_3$
- B
$t_1 = t_2 = t_3$
- ✓
$t_3 > t_2 > t_1$
- D
$t_1 > t_2 = t_3$
AnswerCorrect option: C. $t_3 > t_2 > t_1$
$t_3 > t_2 > t_1$
View full question & answer→MCQ 461 Mark
A clock 'S' is working on oscillations of a spring and a clock 'P' is working on pendulum motion. Both clocks are running at the same rate on earth. What will happen to their functioning on a planet which has the same density as that of earth, but the radius is twice that of earth?
- A
both will run at the same rate, but not the same as on earth
- ✓
'S' will run faster than 'P'
- C
both will run at the same rate as on the earth
- D
AnswerCorrect option: B. 'S' will run faster than 'P'
View full question & answer→MCQ 471 Mark
The mass of a body on the surface of the earth is $10 kg$. The mass of the same body on the surface on the moon is $g _{ m }=\frac{1}{6} g _{ e ^{\prime}}$ where $g _{ m ^{\prime}} g _{ e }$ acceleration due to gravity on the surface of the moon and the earth respectively.
View full question & answer→MCQ 481 Mark
If bullet of mass $'m_1\ '$ is fired from a gun of mass $'m_2\ '$ with a speed of $'V_1\ '$, then the recoil velocity of gun is $.......$
AnswerCorrect option: A. $-\frac{m_1 V_1}{m_2}$
$-\frac{m_1 V_1}{m_2}$
View full question & answer→MCQ 491 Mark
A block of mass Mis pulled along a smooth horizontal surface with a rope of mass m by force F. The acceleration of the block will be ______.
- A
$\frac{ F }{( M - m )}$
- B
$\frac{ F }{ M }$
- C
$\frac{ F }{ m }$
- ✓
$\frac{ F }{( M + m )}$
AnswerCorrect option: D. $\frac{ F }{( M + m )}$
View full question & answer→MCQ 501 Mark
A body of mass $m$ is performing a $\text{UCM}$ in a circle of radius $r$ with speed $v$. The work done by the centripetal force in moving it through $\left(\frac{2}{3}\right) rd$ of the circular path is
View full question & answer→MCQ 511 Mark
Novolac is obtained from ____________.
- A
Melamine and formaldehyde
- ✓
- C
- D
View full question & answer→MCQ 521 Mark
Which among the following polymer does not show cross-linking in it?
MCQ 531 Mark
Which of the following polymer is used in paints?
MCQ 541 Mark
Which of the following is not present in DNA?
MCQ 551 Mark
Which of the following molecules from a zwitter ion?
- A
$CH_3CH_2COOH$
- ✓
$H_2NCH_2COOH$
- C
$CH_3COOCH_3$
- D
$CH_3COC_2H_5$
AnswerCorrect option: B. $H_2NCH_2COOH$
$H_2NCH_2COOH$
View full question & answer→MCQ 561 Mark
Replacement of diazo group by Cl using cuprous chloride is known as ____________.
MCQ 571 Mark
The reduction of alkyl cyanide with sodium and ethanol to give primary amines is, ____________.
MCQ 581 Mark
Hinsberg's reagent is ______.
- A
sodium benzene sulphonate
- ✓
benzene sulphonyl chloride
- C
- D
AnswerCorrect option: B. benzene sulphonyl chloride
View full question & answer→MCQ 591 Mark
In the reaction, $C _6 H _5 COCH _3 \frac{[ H ]}{ Zn-Hg/ \text {conc } \cdot \mathrm { HCl } } XX$ is
View full question & answer→MCQ 601 Mark
The reducing agent preferred to convert carboxylic acids and esters to primary alcohols is $ .......$
- A
$H_2/Ni$
- ✓
$LiAIH_4$
- C
$Na-Hg/H_2O$
- D
$NaBH_4$
AnswerCorrect option: B. $LiAIH_4$
$LiAIH_4$
View full question & answer→MCQ 611 Mark
Which of the following does not give yellow solid on treatment with sodium hypoiodlte?
MCQ 621 Mark
IUPAC name of Catechol is ____________.
MCQ 631 Mark
The conversion of 2-methylpropan-1-ol to 2-methylpropan-2-ol is ______.
MCQ 641 Mark
How many metameric ethers are represented by the molecular formula $C_4H_{10}O$ ?
View full question & answer→MCQ 651 Mark
Nicol's prism is made of $.........$
- A
$CaSO_4$
- B
$Ca_3(PO_4)_2$
- C
$CaSiO_3$
- ✓
$CaCO_3$
AnswerCorrect option: D. $CaCO_3$
$CaCO_3$
View full question & answer→MCQ 661 Mark
Which among the following compounds in crystalline form is used for making Nicol's prism?
- ✓
$CaCO_3$
- B
$CaSO_4$
- C
$Na_2AIF_6$
- D
$Al_2O_3$
AnswerCorrect option: A. $CaCO_3$
$CaCO_3$
View full question & answer→MCQ 671 Mark
The complex ions $[Co(H_2O)_5(ONO)]^{2+}$ and $[Co(H_2O)_5NO_2]^{2+}$ are $........$
View full question & answer→MCQ 681 Mark
IUPAC name of the complex $Ba \left( CuCl _4\right)$ is ______.
- A
tetrachlorobariumcuprate (III)
- B
tetrachlorobarium copper (II)
- C
barium tetrachlorocuprate (III)
- ✓
barium tetrachlorocuprate (II)
AnswerCorrect option: D. barium tetrachlorocuprate (II)
View full question & answer→MCQ 691 Mark
Which among the following is a neutral complex?
- ✓
$[Pt(NH_3)_2Cl_2]$
- B
$[Ni(NH_3)_6]Cl_2$
- C
$K[Ag(CN)_2]$
- D
$[Fe(H_2O)_6]Cl_3$
AnswerCorrect option: A. $[Pt(NH_3)_2Cl_2]$
$[Pt(NH_3)_2Cl_2]$
View full question & answer→MCQ 701 Mark
Which of the following is not the mineral of iron?
MCQ 711 Mark
Which among the following substances is used as a catalyst for thermal decomposition of potassium chlorate?
- A
$V_2O_5$
- B
$CuCl_2$
- C
$Fe$
- ✓
$MnO_2$
AnswerCorrect option: D. $MnO_2$
$MnO_2$
View full question & answer→MCQ 721 Mark
The ionic charges of manganate and permanganate ion are respectively.
MCQ 731 Mark
The shape of $BrF_5$ molecule is $........$
View full question & answer→MCQ 741 Mark
Arrange the following in the increasing order of their acidic strength.
MCQ 751 Mark
The oxidation state of sulphur in $H_2S_2O_7$ is $.......$
View full question & answer→MCQ 761 Mark
Consider the reaction $2 A+2 B \longrightarrow C+2 D$, if concentration of $A$ is doubled at constant $[B]$, rate increases by a factor $4$ . If concentration $B$ is doubled at constant $[A]$ the rate is doubled. Rate law of the reaction is
AnswerCorrect option: D. rate $= k[A]^2 [B]$
rate $= k[A]^2 [B]$
View full question & answer→MCQ 771 Mark
For the elementary reaction,
$
3 H _{2(g)}+ N _{2(g)} \longrightarrow 2 NH _{3(g)}
$
identify the correct relation among the following relations.
- A
$\frac{ d \left[ NH _{3( g )}\right]}{ dt }=\frac{-1}{3} \frac{ d \left[ H _{2( g )}\right]}{ dt }$
- B
$\frac{-3}{2} \frac{ d \left[ H _{2( g )}\right]}{ dt }=\frac{ d \left[ NH _{3( g )}\right]}{ dt }$
- ✓
$\frac{-2}{3} \frac{ d \left[ H _{2( g )}\right]}{ dt }=\frac{ d \left[ NH _{3( g )}\right]}{ dt }$
- D
$\frac{- d \left[ H _{2( g )}\right]}{ dt }=\frac{ d \left[ NH _{3( g )}\right]}{ dt }$
AnswerCorrect option: C. $\frac{-2}{3} \frac{ d \left[ H _{2( g )}\right]}{ dt }=\frac{ d \left[ NH _{3( g )}\right]}{ dt }$
View full question & answer→MCQ 781 Mark
Which among the following reaction is an example of a zero order reaction?
- A
$C _{12} H _{22} O _{11( aq )}+ H _2 O _{( l )} \longrightarrow C _6 H _{12} O _{6( aq )}+ C _6 H _{12} O _{6( aq )}$
- ✓
$2 NH _{3( g )} \xrightarrow{ Pt } N _{2( g )}+3 H _2$
- C
$H _{2( g )}+ I _{2( g )} \longrightarrow 2 HI _{( g )}$
- D
$2 H _2 O _{2( l )} \longrightarrow 2 H _2 O _{( l )}+ O _{2( g )}$
AnswerCorrect option: B. $2 NH _{3( g )} \xrightarrow{ Pt } N _{2( g )}+3 H _2$
View full question & answer→MCQ 791 Mark
In $H_2–O_2$ fuel cell, the reaction taking place at negative electrode is :
- ✓
$2 H _{2( g )}+4 OH _{( aq )}^{-} \longrightarrow 4 H _2 O _{( l )}+4 e ^{-}$
- B
$2 H _{2( g )}+2 OH _{( aq )}^{-} \longrightarrow 2 H _2 O _{( l )}+2 e ^{-}$
- C
$O _{2( g )}+2 H _2 O _{( l )} \longrightarrow 4 OH _{( aq )}^{-}$
- D
$4 OH _{( aq )}^{-} \longrightarrow O _{2( g )}+2 H _2 O _{( l )}+4 e ^{-}$
AnswerCorrect option: A. $2 H _{2( g )}+4 OH _{( aq )}^{-} \longrightarrow 4 H _2 O _{( l )}+4 e ^{-}$
$2 H _{2( g )}+4 OH _{( aq )}^{-} \longrightarrow 4 H _2 O _{( l )}+4 e ^{-}$
View full question & answer→MCQ 801 Mark
Calculate E.M.F. of following cell at $298 KZn _{(s)}\left| ZnSO _4(0.01 M )\right|\left| CuSO _4(1.0 M )\right| Cu u_{(s)}$ if $E_{\text {cell }}^0$ $=2.0 V$.
View full question & answer→MCQ 811 Mark
The resistance of $\frac{1}{10} \ M$ solution is $2.5 \times 10^3\ ohm$. What is the molar conductivity of solution? $($cell constant $=1.25 \ cm ^{-1})$.
- A
$2.5\ ohm^{-1} \ cm^2 mol^{-1}$
- ✓
$5.0 \ ohm^{-1} \ cm^2 mol^{-1}$
- C
$2.0 \ ohm^{-1} \ cm^2 mol^{-1}$
- D
$3.5 \ ohm^{-1} \ cm^2 mol^{-1}$
AnswerCorrect option: B. $5.0 \ ohm^{-1} \ cm^2 mol^{-1}$
$5.0 \ ohm^{-1} \ cm^2 mol^{-1}$
View full question & answer→MCQ 821 Mark
For a reaction to be non-spontaneous at all temperatures, values of ΔH and ΔS respectively are ____________.
MCQ 831 Mark
Based on first law of thermodynamics which of the following is correct.
- ✓
for an isobaric process, $Q_P = \triangle U + W$
- B
for an isochoric process, $\triangle U = - Q_v$
- C
for an adiabatic process, $\triangle U = - W$
- D
for an isothermal process, $Q = + W$
AnswerCorrect option: A. for an isobaric process, $Q_P = \triangle U + W$
for an isobaric process, $Q_P = \triangle U + W$
View full question & answer→MCQ 841 Mark
Three moles of an ideal gas are expanded isothermally from a volume of $300 \ cm^3$ to $2.5 L$ at $300 K$ against a pressure of $1.9 \ atm$. The work done in joules is $.........$
- A
$+ 4.8 J$
- ✓
$- 423.56 J$
- C
$- 4.18 J$
- D
$+ 423.56 J$
AnswerCorrect option: B. $- 423.56 J$
$- 423.56 J$
View full question & answer→MCQ 851 Mark
The elevation in boiling point of $0.25$ molal aqueous solution of a substance is$........(K_b = 0.52 K \ kg \ mol^{-1})$
- ✓
$0.13 K$
- B
$2.08 K$
- C
$0.50 K$
- D
$0.15 K$
AnswerCorrect option: A. $0.13 K$
$0.13 K$
View full question & answer→MCQ 861 Mark
Which of the following sets of solutions of urea $(mol.$ mass $60 \ g mol^{-1})$ and sucrose $(mol.$ mass $342 \ g mol^{-1})$ is isotonic?
- A
$9.1 \ gL^{-1}$ urea and $6.0 \ gL^{-1}$ sucrose
- ✓
$3.0 \ gL^{-1}$ urea and $17.1 \ gL^{-1}$ sucrose
- C
$3.0 \ gL^{-1}$ urea and $3.0 \ gL^{-1}$ sucrose
- D
$6.0 \ gL^{-1}$ urea and $9.0 \ gL^{-1}$ sucrose
AnswerCorrect option: B. $3.0 \ gL^{-1}$ urea and $17.1 \ gL^{-1}$ sucrose
$3.0 \ gL^{-1}$ urea and $17.1 \ gL^{-1}$ sucrose
View full question & answer→MCQ 871 Mark
Which of the following sets of components form homogeneous mixture?
MCQ 881 Mark
Which among the following defects is observed in Brass?
MCQ 891 Mark
Which among the following statements is true about Schottky defect?
- A
In this cation or anion moves from regular site to place between lattice site
- ✓
In this defect cation and anion are lacking in stoichiometric proportion
- C
In this regular cation is replaced by different cation
- D
Formation of metal alloy Is example of this defect
AnswerCorrect option: B. In this defect cation and anion are lacking in stoichiometric proportion
View full question & answer→MCQ 901 Mark
Which among the following pairs of compounds is not isomorphous?
AnswerCorrect option: D. $NaCl$ and $KCl$
$NaCl$ and $KCl$
View full question & answer→MCQ 911 Mark
α-butylene when subjected to hydroboration oxidation reaction, yields ____________.
MCQ 921 Mark
How many 3° carbon atoms are present in 1, 4 dibromo-2-methylpentane?
MCQ 931 Mark
Which among the following is a set of nucleophiles?
- A
$BF_3, H_2O, NH_3$
- B
$AlCl_3, BF_3, NH_3$
- ✓
$CN^−, H_2O, R–OH$
- D
$H^+, NH_3, Cl^−$
AnswerCorrect option: C. $CN^−, H_2O, R–OH$
$CN^−, H_2O, R–OH$
View full question & answer→MCQ 941 Mark
In the reaction,
$
H _2 O _{2(a q)} \xrightarrow{I_{(a q)}} H _2 O _{(l)}+\frac{1}{2} O _{2(g)}
$
iodide ion acts as ________.
View full question & answer→MCQ 951 Mark
What is the density of water vapour at boiling point of water?
- A
$4 \times 10^{-4} g \ cm^{-3}$
- ✓
$6 \times 10^{-4} g \ cm^{-3}$
- C
$1 \times 10^{-4} g \ cm^{-3}$
- D
$1 g \ cm^{-3}$
AnswerCorrect option: B. $6 \times 10^{-4} g \ cm^{-3}$
$6 \times 10^{-4} g \ cm^{-3}$
View full question & answer→MCQ 961 Mark
Which among the following sets of compounds is used as raw material for the preparation of sodium carbonate by Solvay process?
- A
$NH_4Cl, H_2O, NaCl$
- B
$NaOH, HCl, CO_2$
- ✓
$NaCl, NH_3, Ca(OH)_2$
- D
$NaCl, CaCO_3, H_2SO_4$
AnswerCorrect option: C. $NaCl, NH_3, Ca(OH)_2$
$NaCl, NH_3, Ca(OH)_2$
View full question & answer→MCQ 971 Mark
Oxidation state of nitrogen in nitric oxide is ______.
MCQ 981 Mark
Which bond in a molecule of ethyl magnesium bromide is ionic in nature?
MCQ 991 Mark
How many moles of ammonia are present in $5.6 \ cm^3$ of ammonia gas at $\text{STP}$?
- A
$2.0 \times 10^{−4}\ mole$
- B
$3.9 \times 10^{−3}\ mole$
- ✓
$2.5 \times 10^{−4}\ mole$
- D
$4.5 \times 10^{−4} \ mole$
AnswerCorrect option: C. $2.5 \times 10^{−4}\ mole$
$2.5 \times 10^{−4}\ mole$
View full question & answer→MCQ 1001 Mark
The temperature of 32°C is equivalent to ______.
MCQ 1011 Mark
Particulate pollution from industries and power generation plants can be controlled by ______
- A
- B
- C
The positive crankcase ventilation valve
- ✓
Electrostatic precipitators
AnswerCorrect option: D. Electrostatic precipitators
View full question & answer→MCQ 1021 Mark
Find out INCORRECT from the following with respect to in-situ conservation.
MCQ 1031 Mark
Bad ozone is present in ______
MCQ 1041 Mark
This air pollutant $.........$ also called a laughing gas is lethal to human beings at exposure to $100\ ppm$ or more.
AnswerCorrect option: C. $N_2O ($Nitrous Oxide$)$
$N_2O ($Nitrous Oxide$)$
View full question & answer→MCQ 1051 Mark
The same land which is used for both cropping and forestry is ______
MCQ 1061 Mark
Ajit's mother has visited a lake & on returning home she was so excited that she jumbled up the sequence of hydrarch succession. How does Ajit arrange the sequence correctly from center to periphery?
- A
Phytoplankton → submerged hydrophytes → floating hydrophytes → sedges
- B
Sedges → submerged hydrophytes → floating hydrophytes → phytoplankton
- ✓
Phytoplankion → submerged hydrophytes → floating hydrophytes → sedges
- D
Floating hydrophyte → submerged hydrophyte → sedges → phytoplankton
AnswerCorrect option: C. Phytoplankion → submerged hydrophytes → floating hydrophytes → sedges
View full question & answer→MCQ 1071 Mark
Nita's mother asked her to dump the vegetable waste from her kitchen into the garden. ita wanted to know the fate of this vegetable waste. Give the correct sequence of decomposition of this waste?
- A
Humification → fragmentation → catabolism → leaching
- B
Catabolism → leaching → fragmentation → humification
- C
B → leaching → fragmentation → catabolism → humification
- ✓
Fragmentation → leaching → catabolism → humification
AnswerCorrect option: D. Fragmentation → leaching → catabolism → humification
View full question & answer→MCQ 1081 Mark
A protozoan living in the digestive tract of a flea that lives on a dog is an example of ______
MCQ 1091 Mark
Musk deer is an example of ______
MCQ 1101 Mark
Changing nature of population is called ______
MCQ 1111 Mark
EcoRl & Hind III are the examples of ______
- A
- B
- C
- ✓
Restriction endonucleases
AnswerCorrect option: D. Restriction endonucleases
View full question & answer→MCQ 1121 Mark
Human insulin is produced by culturing the genetically engineered ______
- ✓
- B
- C
Agrobacterium tumefaciens
- D
View full question & answer→MCQ 1131 Mark
The process of genetic recombination in bacteria in which viruses are involved as the vector is called ______
MCQ 1141 Mark
A technique used to make numerous copies of a specific DNA segment quickly and accurately is called ______
- ✓
Polymerase chain reaction
- B
- C
- D
Polynucleotide chain reaction
AnswerCorrect option: A. Polymerase chain reaction
View full question & answer→MCQ 1151 Mark
Dr. Alexander Fleming discovered antibiotics when he was working with the bacterium ______
MCQ 1161 Mark
View full question & answer→MCQ 1171 Mark
In the process of sewage treatment, the activated sludge is digested by ______
MCQ 1181 Mark
Competition between cow, horse and deer for getting grass as food is called ______.
- A
Prodigality of production
- ✓
- C
- D
View full question & answer→MCQ 1191 Mark
In Multiple Ovulation Embryo Transfer, the cow is administered with ______ to induce follicular.
- ✓
Follicle-stimulating hormone
- B
- C
- D
AnswerCorrect option: A. Follicle-stimulating hormone
View full question & answer→MCQ 1201 Mark
Golden rice, a transgenic crop contains which of the following improved trait?
MCQ 1211 Mark
The science of changing and improving the heredity of plants is called ______
MCQ 1221 Mark
Which method of plant breeding has been used to develop a powdery mildew-resistant variety of moong beans?
MCQ 1231 Mark
Phagocytic barriers of innate immunity involve ______
- A
Neutrophils and acidophils
- B
- C
- ✓
Neutrophils and monocytes
AnswerCorrect option: D. Neutrophils and monocytes
View full question & answer→MCQ 1241 Mark
Cocaine is obtained from ______ plant.
MCQ 1251 Mark
Wuchereria bancrofti causes ______
- A
- ✓
- C
Servous cavity filariasis
- D
View full question & answer→MCQ 1261 Mark
Pathogenicity of Salmonella typhi is due to ______ present in its outer membrane.
MCQ 1271 Mark
The reflex arc which is made up of one sensory and one motor neuron is ______
MCQ 1281 Mark
- A
X-Interstitial cells, Y-endolymph
- B
X-islets of Langerhans, Y-glucagon
- C
X-Leydig cells - Y-thyroxine
- ✓
X-parafollicular cells, Y-colloid
AnswerCorrect option: D. X-parafollicular cells, Y-colloid
View full question & answer→MCQ 1291 Mark
Medulla oblongata controls involuntary vital activity such as ______
MCQ 1301 Mark
Select the CORRECT match of part of the human ear and its function.
- ✓
Crista and macula - responsible for maintenance of body posture and balance
- B
Organ of Corti - receptors for the sense of vision
- C
Tympanic membrane - connects middle ear cavity with the pharynx
- D
Ear ossicles - transmission of sound waves from the internal ear
AnswerCorrect option: A. Crista and macula - responsible for maintenance of body posture and balance
View full question & answer→MCQ 1311 Mark
Vomiting is controlled by ______
MCQ 1321 Mark
Select the motor nerves from the following group.
- A
Olfactory, Occulomotor, Hypoglossal
- ✓
Occulomotor, Abducens, Hypoglossal
- C
Olfactory, Optic, Abducens
- D
Trigeminal, Facial, Spinal accessory
AnswerCorrect option: B. Occulomotor, Abducens, Hypoglossal
View full question & answer→MCQ 1331 Mark
Which one of the following is correct?
- A
Lymph = Plasma + RBCs + Platelets
- B
Blood = Plasma + (RBCs + WBCs + Platelets)
- ✓
Lymph = Blood - (RBCs + platelets + some plasma proteins)
- D
Blood = Plasma + RBCs + Leucocytes
AnswerCorrect option: C. Lymph = Blood - (RBCs + platelets + some plasma proteins)
View full question & answer→MCQ 1341 Mark
Which one of the following plasma proteins brings about coagulation of blood?
MCQ 1351 Mark
In a healthy adult man, the type of leucocytes performing phagocytosis is ______
MCQ 1361 Mark
Decrease and increase in the number of RBCs is respectively termed as ______
- A
Polycythemia and erythropoiesis
- B
Erythrocytopenia and erythropoiesis
- ✓
Erytbrocytopenia and polycythemia
- D
Polycythemia and erythrocytopenia
AnswerCorrect option: C. Erytbrocytopenia and polycythemia
View full question & answer→MCQ 1371 Mark
Observe the diagram, Identify the parts labelled as P, Q, R, S. Choose the correct option for the conduction of cardiac impulse
- A
P - AV node, Q - SA node, R - Bundle of His, S - Purkinje fibres
- B
P - Purkinje fibres, Q - Bundle of His, R - AV node, S - SA node
- C
P - Bundle of His, Q - Purkinje fibres, R - SA node, S - AV node
- ✓
P - SA node, Q - AV node, R - Bundle of His, S - Purkinje fibres
AnswerCorrect option: D. P - SA node, Q - AV node, R - Bundle of His, S - Purkinje fibres
View full question & answer→MCQ 1381 Mark
The inner surface of the ventricle is thrown into series of irregular muscular ridges called ______
MCQ 1391 Mark
In the given diagram, 'X' indicates ______.
- A
Pulmonary artery conducting oxygenated blood away from the heart
- B
Pulmonary vein conducting oxygenated blood
- C
Systemic Aorta conducting oxygenated blood away from the heart.
- ✓
Pulmonary artery conducting deoxygenated blood away from the heart
AnswerCorrect option: D. Pulmonary artery conducting deoxygenated blood away from the heart
View full question & answer→MCQ 1401 Mark
Which of the following is correct?
- ✓
Blood = Plasma + RBCs + WBCs + Blood platelets
- B
Plasma = Blood + Lymphocytes
- C
Lymph = Plasma + RBCs + WBCs
- D
Serum = Blood + fibrinogen
AnswerCorrect option: A. Blood = Plasma + RBCs + WBCs + Blood platelets
View full question & answer→MCQ 1411 Mark
Number of lobes in right and left lungs respectively in human being is ______.
MCQ 1421 Mark
$CO_2$ carried from the tissue cells in the blood is in the form of $........$
- A
$NaHCO_3$ only
- B
$Na_2CO_3$ only
- ✓
$NaHCO_3$ and $KHCO_3$
- D
$NaCO_3$ and $NaOH$
AnswerCorrect option: C. $NaHCO_3$ and $KHCO_3$
$NaHCO_3$ and $KHCO_3$
View full question & answer→MCQ 1431 Mark
Gibberellin was first extracted from _______.
MCQ 1441 Mark
Which of the following is the sink end of the plant?
MCQ 1451 Mark
Chilling treatment of geminating seeds stimulates the formation of ______ hormone that induces flowering.
MCQ 1461 Mark
The dieback of Citrus and reclamation disease of cereals and leguminuous plants is due to the deficiency of ______.
MCQ 1471 Mark
Identify the CORRECT statement about the active absorption of water.
- A
The suction force is not transmitted from leaf veins to root hair.
- ✓
The water enters the root hair by osmosis.
- C
There is no expenditure of energy.
- D
Living cells and root do not play an important role in water absorption.
AnswerCorrect option: B. The water enters the root hair by osmosis.
View full question & answer→MCQ 1481 Mark
Identify the CORRECT statement about the active absorption of water.
- A
Living cells and root do not play an important role in water absorption.
- B
The suction force is not transmitted from leaf veins to root hair.
- C
There is no expenditure of energy.
- ✓
The water enters the root hair by osmosis.
AnswerCorrect option: D. The water enters the root hair by osmosis.
View full question & answer→MCQ 1491 Mark
Select the CORRECT set of homologous organs.
- A
Wings of insect, bird and bat
- B
Vemifonn appenctix. caecum, coccyx
- ✓
Forelimbs of frog, lizard, bird and bat
- D
Caecum, Wings of insect, forelimbs of bird
AnswerCorrect option: C. Forelimbs of frog, lizard, bird and bat
View full question & answer→MCQ 1501 Mark
Which of the following is also called prehistoric man?
MCQ 1511 Mark
In a population, Hardy Weinberg equilibrium is disturbed by following factors EXCEPT ______.
MCQ 1521 Mark
In Urey and Miller's experiment. the ratio of ammonia: hydrogen : methane was _______.
MCQ 1531 Mark
The largest cranial capacity was found in ______.
MCQ 1541 Mark
Competition between cow, horse and deer for getting grass as food is called ______.
- A
- ✓
- C
- D
Prodigality of production
View full question & answer→MCQ 1551 Mark
Variable number of tandem repeats has significance in ______.
- ✓
- B
Production of transgenic animals
- C
- D
View full question & answer→MCQ 1561 Mark
Which one of the following scientist performed the experiment with bacteriophage to prove DNA as genetic material?
MCQ 1571 Mark
In a eukaryotic transcription and translation take place ______.
- A
In cytoplasm and ribosomes
- B
- ✓
- D
View full question & answer→MCQ 1581 Mark
Which one of the following is wrongly matched?
- A
Adenine, Guaninie → Purines
- B
Cytosine, Thymine → Pyrimidine
- ✓
Thymine, Guanine → Pyrimidine
- D
Cytosine, Uracil → Pyrimidine
AnswerCorrect option: C. Thymine, Guanine → Pyrimidine
View full question & answer→MCQ 1591 Mark
Which one of the following Is NOT a structural part of a transcription unit in DNA?
MCQ 1601 Mark
Which of the following does NOT agree with chrotnosomal theory of inheritance?
- A
Gametes carry hereditary character
- ✓
During gamete formation, homologous chromosomes remain together.
- C
Nucleus contains are diploid
- D
Somatic cells are diploid
AnswerCorrect option: B. During gamete formation, homologous chromosomes remain together.
View full question & answer→MCQ 1611 Mark
Chromosomal constitution of normal human females can be written as ______.
MCQ 1621 Mark
Which of the following develops through parthenogene is?
MCQ 1631 Mark
A short stature with webbing of neck and low posterior hairline indicates ______ syndrome.
MCQ 1641 Mark
A gene which causes death of its bearer is ______.
MCQ 1651 Mark
Which one of the following genotype will yield only one type of gamete?
MCQ 1661 Mark
One of the reasons why law of segregation of gametes is universally applicable, is ______.
- ✓
Gametes are haploid in higher organisms.
- B
Gametes arc always hybrids.
- C
Gametes receive both the factors controlling a particular trait.
- D
Gametes are diploid in higher organisms.
AnswerCorrect option: A. Gametes are haploid in higher organisms.
View full question & answer→MCQ 1671 Mark
Failure of testes to descend from abdomen into scrotum leads to ______.
MCQ 1681 Mark
Conversion of spermatid into sperm is called as _______.
MCQ 1691 Mark
Which one the following is a part of external genitalia of a female human being?
MCQ 1701 Mark
On the fourteenth day of the menstrual cycle the female gamete released is _____.
MCQ 1711 Mark
Select the MISMATCHED pair.
- A
Placenta - Human Chronic gonadotropin
- B
Corpus Luteum - Progesterone
- ✓
Cowper's gland - Prostagindin
- D
AnswerCorrect option: C. Cowper's gland - Prostagindin
View full question & answer→MCQ 1721 Mark
The part of fallopian tube closest to the ovary is ______.
MCQ 1731 Mark
In human female, during which state of parturition does amnion and chorion rupture?
MCQ 1741 Mark
Each testis is connected to the wall of scrotum by short. fibromuscular band called ______.
MCQ 1751 Mark
Fructose is found in secretion of ______.
MCQ 1761 Mark
In Primrose, self-pollination is avoided by _______.
MCQ 1771 Mark
Asexual reproduction is also known as ______.
MCQ 1781 Mark
ln grafting stock forms ______ of grafted plant.
MCQ 1791 Mark
The pollen tube after entering into an ovule is attracted by ______.
- A
- ✓
Filliorm apparatus of synergid
- C
- D
AnswerCorrect option: B. Filliorm apparatus of synergid
View full question & answer→MCQ 1801 Mark
Gemmule formation takes place in ________.
MCQ 1811 Mark
Arrangement of flowers in the given plant favours which type of pollination?
MCQ 1821 Mark
Which one of the following is unique to flowers pollinated by bats?
- A
Flowers without any fragrance
- B
Flowers are without nectar
- C
Bright coloured flowers with pleasant fragrance
- ✓
Flowers emit rotten fruit like odour
AnswerCorrect option: D. Flowers emit rotten fruit like odour
View full question & answer→MCQ 1831 Mark
The layer of another wall that helps in the dehiscence of another at maturity is ______.
MCQ 1841 Mark
Identify the CORRECT Sequence of matches with the type of pollination and its characteristics.
| a. | Ornithophily | 1. | nocturnal flower |
| b. | Entomophily | 2. | light pollens |
| c. | Chiropterophily | 3. | funnel shaped corolla |
| d. | Anemophily | 4. | pleasant fragrance neactar |
- A
a - 4, b - 3, c - 1, d - 2
- B
a - 2, b - 1, c - 3, d - 4
- C
a - 3, b - 4, c - 2, d - 1
- ✓
a - 3, b - 4, c - 1, d - 2
AnswerCorrect option: D. a - 3, b - 4, c - 1, d - 2
View full question & answer→MCQ 1851 Mark
The asexual reproduction in bacteria occurs by ______.
MCQ 1861 Mark
A student tried to perform grafting in maize but he was unsuccessful. What will be the reason for this?
- A
The stock & scion are not suitable to each other.
- ✓
Maize plants do not show intrafascicular cambium.
- C
The season is not good for grafting
- D
Maize plants are susceptible to disease
AnswerCorrect option: B. Maize plants do not show intrafascicular cambium.
View full question & answer→MCQ 1871 Mark
If flower shows presence of pollen grains having smooth exine and versatile anthers 8 than it is a floral adaptation for ______.
MCQ 1881 Mark
Among the following animals, the best conserver of water is ______.
MCQ 1891 Mark
Nitrogenous waste substance produced in liver during ornithine cycle is ______.
MCQ 1901 Mark
JG cells of Kidney secrete ______.
MCQ 1911 Mark
Ptyallin is an enzyme secreted by _____.
MCQ 1921 Mark
The organ that does NOT secrete any digestive enzyme is ______.
MCQ 1931 Mark
Which one of the following are sequential steps during fermentation?
- A
Decarboxylation → hydrolysis → glycolysis → reduction
- B
Glycolysis → hydrolysis → reduction → decarboxylation
- C
Reduction → glycolysis → hydrolysis → decarboxylation
- ✓
Hydrolysis → glycolysis → decarboxylation → reduction
AnswerCorrect option: D. Hydrolysis → glycolysis → decarboxylation → reduction
View full question & answer→MCQ 1941 Mark
Oxidation of $NADH_2$ and $FADH_2$ takes place during $\text{ETS},$ which is associated with $........$
View full question & answer→MCQ 1951 Mark
During glycolysis, the first molecule to be dehydrogenated is ______.
- A
Fructose 1, 6, disphosphate
- B
- ✓
- D
View full question & answer→MCQ 1961 Mark
During Krebs cycle $FADH_2$ is formed in conversion of $.......$
- A
lsocitric acid $\rightarrow $ Oxalo succinic acid
- B
Succinyl coenzyme $A \rightarrow $ Succinic acid
- ✓
Succinic acid $\rightarrow $ Fumaric acid
- D
Succinyl coenzyme $A \rightarrow $ Succininc acid
AnswerCorrect option: C. Succinic acid $\rightarrow $ Fumaric acid
Succinic acid $\rightarrow $ Fumaric acid
View full question & answer→MCQ 1971 Mark
During glycolysis of aerobic respiration, how many times oxidation of substrate occurs?
MCQ 1981 Mark
During Krebs cycle oxalo acetic acid is formed by oxidation of ______.
MCQ 1991 Mark
Which one of the following sugar does NOT have same empirical fonnula as that of carbohydrate?
MCQ 2001 Mark
Enzymes can react with acidic or basic substances due to their ______ nature.
