MHT - CET MCQ

In a transistor, doping level in base is increased slightly, the collector current and base current respectively ______.

A radioactive substance of half-life 69.3 days is kept in a container. The time in which 80% of the substance will disintegrate will be ______

[take ln(5) = 1.61]

When an electron in a hydrogen atom jumps from the third orbit to the second orbit, it emits a photon of wavelength 'λ'. When it jumps from the fourth orbit to third orbit, the wavelength emitted by the photon will be ______.

For an electron, discrete energy levels are characterised by ____________.

In hydrogen spectrum, which of the following spectral series lies in ultraviolet region?

If the potential difference used to accelerate electrons is doubled, by what factor does the de-Broglie wavelength associated with the electrons change?

Out of the following statements which one is correct?

Which one of the following statements ts INCORRECT for stopping potential in photoelectric emission?

An a.c. source of variable frequency 'f' is connected to an LCR series circuit. Which one of the graphs represent the variation of current 'I' in the circuit with frequency 'f'?

A transistor-oscillator using a resonant circuit with an inductor L (of negligible resistance) and a capacitor C in series produce oscillation of frequency f. If L is doubled and C is changed to 4C, the frequency will be ____________.

The oscillation in L.C. circuit is produced due to ____________.

A coil of inductance 'L' is connected to an a.c. source of emf 'E' and frequency 'f'.

The current in the coil is ____________.

In an induction coil, the coefficient of mutual inductance is 6 henry. If a current of 10 ampere in the primary coil is cut-off in `1/1500"s"`, the e.m.f. at the terminals of the secondary coil will be ____________.

A coil having effective area A, is held with its plane normal to a magnetic field of induction B. The magnetic induction is quickly reduced to 25% of its initial value in 4 s. Then e.m.f. induced across the coil will be ____________.

The product of magnetic susceptibility (`chi`) and absolute temperature (T) is constant for a ____________.

SI Unit of Magnetization is ____________.

Magnetic induction due to a toroid does not depend upon ______.

Two current-carrying coils have radii r and 4r and have same magnetic induction at their centres. The ratio of voltage applied across them is ______.

A very high magnetic field is applied to a stationary charge. Then the charge experiences ______.

When a galvanometer of resistance G is converted to an ammeter of range l A, then the current passing through S is ____________.

The length of a wire of a potentiometer is 100 cm, and the e.m.f of its standard cell is E volt. It is employed to measure the e.m.f of a battery whose internal resistance is 0.5 `Omega` If the balance point is obtained at `l`= 30 cm from the positive end, the e.m.f of the battery is ____________.

where 'i' is the current in the potentiometer

The magnitude and direction of the current in the circuit shown will be ______ 

Capacity of a parallel plate capacitor with a medium of dielectric constant 8 is 12 µF. If the medium is removed, then capacity of the capacitor would be ____________.

A parallel beam of monochromatic light falls normally on a single narrow slit. The angular width of the central maximum in the resulting diffraction pattern ______

In a diffraction pattern, width of a fringe ____________.

Light entering an air glass (µ = 1.5) boundary is partly reflected and partly refracted. If the incident and reflected rays are at right angles to each other, the angle of refraction r is given by ____________.

Two identical wires are vibrating in unison. If the tension in one of the wires is increased by 2%, five beats are produced per second by the two vibrating wires. The initial frequency of each wire is ______

`(sqrt(1 . 0.2) ≑ 1 . 0.1)`

A uniform rope of mass 6 kg hangs vertically from a rigid support. A block of mass 2 kg is attached to the free end of the rope. A transverse pulse of wavelength 0.06 m is produced at the lower end of the rope. The wavelength of the pulse, when it reaches the top is ______. (in m)

If a pendulum which gives correct time beats second on ground at a certain place is moved to the top of a tower 320 m high, then the loss of time of the pendulum clock in one day, in second, is ______.

When gas is m thermal equilibrium, its molecules have ______

At temperature T, the emissive power and absorption power of a body for certain wavelength are `"e"_lambda` and `"a"_lambda` respectively, then ____________.

Assuming the expression for the pressure exerted by the gas on the wall of the container, it can be shown that pressure is ______.

In a capillary rise experiment, the water level rises to a height of 5 cm. If the same capillary tube is placed in water such that only 3 cm of the tube projects outside the water level, then ____________.

If E, M and P are the kinetic energy, mass and linear momentum of a particle respectively, which of the following relations represents the angular momentum L of the particle when the particle rotates in a circle of radius R?

An engine requires 5 seconds to go from a speed of 600 r.p.m. to 1200 r.p.m. How many revolutions does it make in this period?

Electronic configuration of germanium is 2, 8, 18 and 4. To make it extrinsic semiconductor small quantity of antimony is added. The correct statement is ____________.

The equiconvex lens has focal length 'f'. If it is cut perpendicular to the principal axis passing through optical centre. then focal length of each half will be ____________.

A metal sphere 10.01 cm in diameter is placed on a brass ring of internal diameter 10 cm and at the same temperature of 12° C. The temperature up to which they should be heated together so that the metal sphere just passes through the ring is `[alpha_"metal"= 12 xx 10^-6//°"C" and alpha_"brass" =18 xx 10^-6//°"C"]` ____________.

Two particles of equal mass go around a circle of radius R under the action of their mutual gravitational force of attraction. The speed of each particle is (M = mass of the particle) ____________.

A force of F = `("x"/2 + 15) "N"` acts on a particle. If x 2 is in metre, calculate the work done by the force during the displacement of the particle from x = 0 to x = 4 m

The angular speed of the minute hand of a clock in degrees per second is ______.

A vehicle moving with 15 km/hr comes to rest by covering 5m distance by applying brakes. If the same vehicle moves at 45 km/hr, then by applying brakes, it will come to rest by covering a distance ______.

Which among the following polymer is used to make crockeries?

Nucleotide differs from a nucleoside as it has ______

Which among the following sugars does not reduce Tollen's reagent?

Which among the following has the highest boiling point?

 
Identify the major product (B).

Which of the following compounds is obtained when ethanoic anhydride is treated with water?

Ethyl methyl ketone can be reduced to n-butane by which of the following reactions?

Which of the following statements is INCORRECT for ethers?

Which following reagent is used to obtain alkene from alcohol?

Identify the INCORRECT statement.

Which among the following complexes is a heteroleptic and cationic in nature?

Which of the following properties is NOT of actinoids?

When lanthanoids (Ln) are heated to about 2800 K with carbon, the carbides with general formula ____________ are obtained.

Which among the following gases is used to produce and sustain powerful super conducting magnets for NMR and MRI systems?

How many ions per molecule are produced in the solution when carnallite is dissolved in excess of water?

Two solutions A and B are separated by a semipermeable membrane. If the solvent flows from A to B, then ____________.

If mole fraction of the solvent in a solution decreases, then ____________.

Which of the following pair will have equal magnetic moment value in BM?

The percentage of vacant space of bcc unit cell is ____________.

The reagent used to confirm the presence of five hydroxyl groups in glucose is ____________.

Tyndall effect is useful ______.

Which among the following elements has highest ionisation enthalpy and bears a diagonal relationship with aluminium?

The three electrons have the following set of quantum numbers:

X = 6, 1, −1, `+1/2`

Y = 6, 0, 0, `+1/2`

Z = 5, 1, 0, `+1/2`

Identify the CORRECT statement.

Which of the following is an extensive property?

Acronym for IUCN is ____________.

Select the correct alternative for x and y.

Latitudinal and altitudinal gradient is shown by which of the following habitat(s)?

Within a given geographical area which of the following diversity is related to different types of habitats/ecosystems?

High species richness can be observed at ______.

Identify the stage that immediately precedes the sedge meadow stage in hydroseric succession.

Identify the stage which comes before sedge meadow stage in hydroseric succession.

Pioneers are organisms of _______ seral stage.

In which one of the following organisms does the body fluid enter through nephrostome?

Match the Columns.

	Column A		Column B
i.	Lice on humans	a.	Endoparasites
ii.	Ectoparasites on marine fishes	b.	Grows on hedge plants
iii.	Cuscuta	c.	Ectoparasites
iv.	Plasmodium and humans	d.	Copepods

Parasitism can be conectly represented as ____________.

Identify the correct pair that exhibits commensalism.

What will be the net increase in the population if the average natality was 250, average morta1ity 240, immigration 20 and emigration 30?

Read the following statements and choose the correct option.

Statement I: Desert lizards bask in the sun and absorb heat when their body temperature drops but move into the shade when the ambient temperature starts increasing.

Statement II: Desert lizards evolved physiological adaptations to maintain body temperature.

Transfer of which of the following gene improves the oil content and oil quality of oil crops like soybean, oil palm, rapeseed, and sunflower?

For which of the following needs the transgenic animals are generally produced?

Which of the following is used for the isolation and purification of the desired product produced by transformed cells?

Which of the following is an INCORRECT match?

Identify the reason/s due to which Trichoclerma species is a potent biocontrol agent.

______ is the mycoherbicide.

Into which of the following the sewage water is pumped after preliminary treatment?

Which one of the following processes involved in alcohol production is NOT involved in wine production?

Which of the following is/are used for production of beverages like wine, beer, whiskey, brandy or rum?

Which of the following is the terminology used to describe cancer of breast, lung, and skin?

Which of the following statements is TRUE for individuals having 'AB' blood group?

The entire body is protected from attack from its own immune system due to the ______

Which cells deliver co-stimulatory signals for helper T-cells?

Which type of immunity is acquired due to infection?

Which hormone secreted by the corpus luteum is essential to maintain the endometrium during pregnancy?

Which is the only gland that stores its hormones?

Match the following.

	Column I		Column II
i.	Oxytocin	a.	Stimulates resorption of water and electrolytes in DCT and collecting ducts.
ii.	Vasopressin	b.	Stimulates the synthesis and secretion of thyroid hormones.
iii.	LH	c.	Stimulates contraction of uterus during parturition.
iv.	TSH	d.	Induces discharge of ovum from Graafian follicles.

Which hormones are released by the posterior pituitary?

Identify the secondary messenger(s).

which of the following are hormones stored and released from neurohypophysis?

All of the following are the functions of lymph, EXCEPT

Blood pressure ______ indicates hypotension.

With which of the following event the cardiac cycle starts?

For which of the following reason the SA node acts as the normal pacemaker?

______ is a defensive protein useful in blood clotting.

Which of the following is a major part of the plasma?

Which of the following is TRUE regarding leucocytosis?

Which class of the following phytohonnone does kinetin belong to?

Since ABA inhibits growth which is stimulated by gibberellin it is also called as a ______.

Formation of abscission layer is caused due to ______.

Identify the INCORRECT statement regarding physiological effects of ethylene.

Synonym/IUPAC name of kinetin is ____________.

For which of the following reason root cap has no function in water absorption?

Epiphytic plants like orchids absorb water vapours from air with the help of ______ having special tissue called velamen.

Which of the following are the components of cell wall of root hair?

Which part of the root helps in the maximum absorption of water and minerals?

Which of the following are the properties of water?

The cranial capacity of Homo erectus is ______.

Select the correct chronological order of human evolution.

Identify the human ancestor which showed both ape-like and man-like characters.

____________ results in variation in gene frequencies within population by chance rather than by natural selection.

Reproductive isolation does not occur due to ______.

Meselson and Stahl used ____________ in the experiment to prove semiconservative DNA replication.

In prokaryotes, the enzyme RNA polymerase recognizes the promoter by its ______.

Which of the following was used by Hershey and Chase to provide the unambiguous proof that DNA is the genetic material?

The following diagram represents an important concept in the genetic implication of DNA. Identify A, B and C. 

Match the Column I with Column II and select the correct option.

	List-I		List-II
i.	Ribozyme	a.	Lac operon
ii.	Friedrich Miescher	b.	DNS as genetic material
iii.	Alfred Hershey and Martha Chase	c.	Catalytic RNA molecule
iv.	Francois-Jacob	d.	DNA is acidic substance

Identify the option that correctly represents the number of chromosomes in Down syndrome.

Identify the disease caused by an autosomal primary non-disjunction.

There are five daughters and no son in a family. It is because

Girl of normal vision whose father was colour blind marries a man of normal vision whose father was also colour blind. The sons of this marriage would be ______.

Read the following statements and select the correct option.

Statement I: The densely packed transcriptionally active, light staining region of chromatin is known as 'Heterochromatin'.

Statement II: The loosely packed, dark staining transcriptionally inactive region of chromatin is known as 'Euchromatin'.

Select the correct sequence of oogenesis.

When does ovulatory phase occur?

All are internal genitalia in females. EXCEPT ______.

Womb is used to refer ______.

How much semen is generally present in seminal fluid?

Which of the following is the male accessory gland?

The success of seed plants on land is mainly due to ______.

Identify the INCORRECT statement from the following.

i. The compatible pollen absorbs water and nutrients from the surface of stigma, germinates and produces pollen tube.

ii. The pistil has the ability to recognise and accept the right or compatible pollen of the same species.

iii. Pollination always guarantee the transfer of right type of pollen grain on stigma.

For which of the following reason stigma and anther mature at different times in some plants?

Which type of pollination is observed in Anthocephalus and Kigelia pinnata?

The haploid cell which divides by mitosis to form embryo sac is ______.

How many microspore mother cells will be there in each pollen chamber if there are 1280 microspores in a tetralocular anther?

Reabsorption of water does NOT occur in part labelled as 

The first step of urine formation takes place in the ______.

Role of ADH is ______.

Urethra is a passage from which urine is ____________.

Identify the CORRECT statement.

If fats are not digested properly in humans it may be an indication of ____________.

Bile contains all of the following. EXCEPT

The common bile duct and pancreatic form ______.

Expulsion of undigested food by a voluntary process taking places through the anal opening is called ______.

Which of the following occurs during preparatory phase of glycolysis?

First ______ constitute the preparatory phase through which glucose is phosphorylated twice at the cost of ______ molecules.

____________ refers to a biochemical process of oxidation of organic compounds in an orderly manner for the liberation of chemical energy in the form of ATP.

Match the Column I with Column II and select the correct option.

	Column I		Column II
i.	Lyases	a.	Catalyse hydrolytic reactions
ii.	Ligases	b.	Enzymes catalyzing a transfer of a group G between a pair of substrate S and S'
iii.	Hydrolases	c.	They catalyse remoyal of groups from substrates by mechanisms
iv.	Transferases	d.	They catalyse the linking together 2 compounds

Bile salts bring about emulsification of fats and activate the enzyme ______.

______ is a single ring compound.

From the following identify the INCORRECT match with respect to the different structures of proteins.

Match the columns and select the correct option.

	Column I		Column II
i.	Starch	a.	Animal storage molecule
ii.	Cellulose	b.	Plant storage molecule
iii.	Glycogen	c.	Heparin
iv.	Heteropolysaccharide	d.	Plant cell wall component