MCQ 14 Marks
Which one of the following, with HBr will give a phenol?
- A
- ✓
- C
- D
Answer
View full question & answer→Correct option: B.
(B)
Questions
SECTION - A [CHEMISTY - MCQ]
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20 questions · auto-graded multiple-choice test.
MCQ 24 Marks
First ionisation enthalpy values of first four group 15 elements are given below. Choose the correct value for the element that is a main component of apatite family :
- ✓$1012 kJ mol ^{-1}$
- B$1402 kJ mol ^{-1}$
- C$834 kJ mol ^{-1}$
- D$947 kJ mol ^{-1}$
Answer
View full question & answer→Correct option: A.
$1012 kJ mol ^{-1}$
(A) $1012 kJ mol ^{-1}$
MCQ 34 Marks
The type of oxide formed by the element among $Li , Na , Be , Mg , B$ and Al that has the least atomic radius is :
- ✓$A _2 O _3$
- B$AO _2$
- CAO
- D$A _2 O$
Answer
View full question & answer→Correct option: A.
$A _2 O _3$
(A) $A _2 O _3$
MCQ 44 Marks
Drug X becomes ineffective after $50 \%$ decomposition. The original concentration of drug in a bottle was $16 mg / mL$ which becomes 4 $mg / mL$ in 12 months. The expiry time of the drug in months is _________.
Assume that the decomposition of the drug follows first order kinetics.
Assume that the decomposition of the drug follows first order kinetics.
- A12
- B2
- C3
- ✓6
Answer
View full question & answer→Correct option: D.
6
(D) 6
MCQ 54 Marks
Which one of the following reaction sequences will give an azo dye ?
- ✓
- B
- C
- D
Answer
View full question & answer→Correct option: A.
(A)
MCQ 64 Marks
Given below are two statements :
Statement (I): It is impossible to specify simultaneously with arbitrary precision, both the linear momentum and the position of a particle.
Statement (II) : If the uncertainty in the measurement of position and uncertainty in measurement of momentum are equal for an electron, then the uncertainty in the measurement of velocity is $\geq \sqrt{\frac{h}{\pi}} \times \frac{1}{2 m}$.
In the light of the above statements, choose the correct answer from the options given below :
Statement (I): It is impossible to specify simultaneously with arbitrary precision, both the linear momentum and the position of a particle.
Statement (II) : If the uncertainty in the measurement of position and uncertainty in measurement of momentum are equal for an electron, then the uncertainty in the measurement of velocity is $\geq \sqrt{\frac{h}{\pi}} \times \frac{1}{2 m}$.
In the light of the above statements, choose the correct answer from the options given below :
- AStatement I is true but Statement II is false.
- ✓Both Statement I and Statement II are true.
- CStatement I is false but Statement II is true.
- DBoth Statement I and Statement II are false.
Answer
View full question & answer→Correct option: B.
Both Statement I and Statement II are true.
(B) Both Statement I and Statement II are true.
MCQ 74 Marks
If C (diamond $) \rightarrow C$ (graphite $)+ X kJ mol { }^{-1}$$
\begin{array}{l}
C(\text { diamond })+O_2(g) \rightarrow CO_2(g)+Y kJ mol^{-1} \\
C(\text { graphite })+O_2(g) \rightarrow CO_2(g)+ZkJ mol^{-1}
\end{array}
$
At constant temperature. Then
\begin{array}{l}
C(\text { diamond })+O_2(g) \rightarrow CO_2(g)+Y kJ mol^{-1} \\
C(\text { graphite })+O_2(g) \rightarrow CO_2(g)+ZkJ mol^{-1}
\end{array}
$
At constant temperature. Then
- A$X = Y + Z$
- B$-X=Y+Z$
- C$X=-Y+Z$
- ✓$X=Y-Z$
Answer
View full question & answer→Correct option: D.
$X=Y-Z$
(D) $X=Y-Z$
MCQ 84 Marks
Total number of sigma $(\sigma)$ _________ and $pi (\pi)$ _________ bonds respectively present in hex-1-en-4-yne are :
- ✓13 and 3
- B11 and 3
- C3 and 13
- D14 and 3
Answer
View full question & answer→Correct option: A.
13 and 3
(A) 13 and 3
Sol.
$\begin{array}{l}\sigma \text { bonds }=13 \\ \pi \text { bonds }=3\end{array}$
Sol.
$\begin{array}{l}\sigma \text { bonds }=13 \\ \pi \text { bonds }=3\end{array}$
MCQ 94 Marks
Identify the homoleptic complexes with odd number of d electrons in the central metal.
(A) $\left[ FeO _4\right]^{2-}$
(B) $\left[ Fe ( CN )_6\right]^{3-}$
(C) $\left[ Fe ( CN )_5 NO \right]^{2-}$
(D) $\left[ CoCl _4\right]^{2-}$
(E) $\left[ Co \left( H _2 O \right)_3 F_3\right]$
Choose the correct answer from the options given below :
(A) $\left[ FeO _4\right]^{2-}$
(B) $\left[ Fe ( CN )_6\right]^{3-}$
(C) $\left[ Fe ( CN )_5 NO \right]^{2-}$
(D) $\left[ CoCl _4\right]^{2-}$
(E) $\left[ Co \left( H _2 O \right)_3 F_3\right]$
Choose the correct answer from the options given below :
- ✓(B) and (D) only
- B(C) and (E) only
- C(A), (B) and (D) only
- D(A), (C) and (E) only
Answer
View full question & answer→Correct option: A.
(B) and (D) only
(A) (B) and (D) only
MCQ 104 Marks
$O _2$ gas will be evolved as a product of electrolysis of :
(A) an aqueous solution of $AgNO _3$ using silver electrodes.
(B) an aqueous solution of $AgNO _3$ using platinum electrodes.
(C) a dilute solution of $H _2 SO _4$ using platinum electrodes.
(D) a high concentration solution of $H _2 SO _4$ using platinum electrodes.
Choose the correct answer from the options given below :
(A) an aqueous solution of $AgNO _3$ using silver electrodes.
(B) an aqueous solution of $AgNO _3$ using platinum electrodes.
(C) a dilute solution of $H _2 SO _4$ using platinum electrodes.
(D) a high concentration solution of $H _2 SO _4$ using platinum electrodes.
Choose the correct answer from the options given below :
- ✓(B) and (C) only
- B(A) and (D) only
- C(B) and (D) only
- D(A) and (C) only
Answer
View full question & answer→Correct option: A.
(B) and (C) only
(A) (B) and (C) only
MCQ 114 Marks
Match List-I with List-II:
Choose the correct answer from the options given below:
| List-1 Applications | List-II Batteries/Cell | ||
| (A) | Transistors | (I) | Anode - Zn/Hg; Cathode - HgO+C |
| (B) | Hearing aids | (II) | Hydrogen fuel cell |
| (C) | Invertors | (III) | Anode-Zn;Cathode Carbon |
| (D) | Apollo space ship | (IV) | Anode-Pb;Cathode Pb | PbO₂ |
- ✓(A)-(III), (B)-(I), (C)-(IV), (D)-(II)
- B(A)-(III), (B)-(II), (C)-(IV), (D)-(I)
- C(A)-(IV), (B)-(III), (C)-(II), (D)-(I)
- D(A)-(II), (B)-(III), (C)-(IV), (D)-(I)
Answer
View full question & answer→Correct option: A.
(A)-(III), (B)-(I), (C)-(IV), (D)-(II)
(A) (A)-(III), (B)-(I), (C)-(IV), (D)-(II)
MCQ 124 Marks
0.1 M solution of KI reacts with excess of $H _2 SO _4$ and $KIO _3$ solution. According to equation
$
5 I^{-}+IO_3^{-}+6 H^{+} \rightarrow 3 I_2+3 H_2 O
$
Identify the correct statements :
(A) 200 mL of KI solution reacts with 0.004 mol of $KIO _3$
(B) 200 mL of KI solution reacts with 0.006 mol of $H _2 SO _4$
(3) 0.5 L of KI solution produced 0.005 mol of $I _2$
(4) Equivalent weight of $KIO _3$ is equal to$
\left(\frac{\text { Molecular weight }}{5}\right)
$
Choose the correct answer from the options given below:
$
5 I^{-}+IO_3^{-}+6 H^{+} \rightarrow 3 I_2+3 H_2 O
$
Identify the correct statements :
(A) 200 mL of KI solution reacts with 0.004 mol of $KIO _3$
(B) 200 mL of KI solution reacts with 0.006 mol of $H _2 SO _4$
(3) 0.5 L of KI solution produced 0.005 mol of $I _2$
(4) Equivalent weight of $KIO _3$ is equal to$
\left(\frac{\text { Molecular weight }}{5}\right)
$
Choose the correct answer from the options given below:
- ✓(A) and (D) only
- B(B) and (C) only
- C(A) and (B) only
- D(C) and (D) only
Answer
View full question & answer→Correct option: A.
(A) and (D) only
(A) (A) and (D) only
MCQ 134 Marks
Given below are two statements :
Statement (I) : On nitration of m-xylene with $HNO _3, \quad H _2 SO _4$ followed by oxidation, 4-nitrobenzene-1, 3-dicarboxylic acid is obtained as the major product.
Statement (II) : $CH _3$ group is o/p-directing while$NO _2$ group is m-directing group.
In the light of the above statements, choose the correct answer from the options given below :
Statement (I) : On nitration of m-xylene with $HNO _3, \quad H _2 SO _4$ followed by oxidation, 4-nitrobenzene-1, 3-dicarboxylic acid is obtained as the major product.
Statement (II) : $CH _3$ group is o/p-directing while$NO _2$ group is m-directing group.
In the light of the above statements, choose the correct answer from the options given below :
- ABoth Statement I and Statement II are false
- BStatement I is false but Statement II is true
- ✓Both Statement I and Statement II are true
- DStatement I is true but Statement II is false
Answer
View full question & answer→Correct option: C.
Both Statement I and Statement II are true
(C) Both Statement I and Statement II are true
Sol. Statement-I
Statement-II
$- CH _3$ group is o/p directing while $- NO _2$ group is meta directing.
Sol. Statement-I
Statement-II
$- CH _3$ group is o/p directing while $- NO _2$ group is meta directing.
MCQ 144 Marks
Given below are two statements :
Statement (I) : NaCl is added to the ice at $0^{\circ} C$, present in the ice cream box to prevent the melting of ice cream.
Statement (II) : On addition of NaCl to ice at $0^{\circ} C$, there is a depression in freezing point.
In the light of the above statements, choose the correct answer from the options given below :
Statement (I) : NaCl is added to the ice at $0^{\circ} C$, present in the ice cream box to prevent the melting of ice cream.
Statement (II) : On addition of NaCl to ice at $0^{\circ} C$, there is a depression in freezing point.
In the light of the above statements, choose the correct answer from the options given below :
- AStatement I is false but Statement II is true
- ✓Both Statement I and Statement II are true
- CBoth Statement I and Statement II are false
- DStatement I is true but Statement II is false
Answer
View full question & answer→Correct option: B.
Both Statement I and Statement II are true
(B) Both Statement I and Statement II are true
MCQ 154 Marks
Consider the equilibrium
$
CO(g)+3 H_2(g) \rightleftharpoons CH_4(g)+H_2 O(g)
$
If the pressure applied over the system increases by two fold at constant temperature then
(A) Concentration of reactants and products increases.
(B) Equilibrium will shift in forward direction.
(C) Equilibrium constant increases since concentration of products increases.
(D) Equilibrium constant remains unchanged as concentration of reactants and products remain same.
Choose the correct answer from the options given below :
$
CO(g)+3 H_2(g) \rightleftharpoons CH_4(g)+H_2 O(g)
$
If the pressure applied over the system increases by two fold at constant temperature then
(A) Concentration of reactants and products increases.
(B) Equilibrium will shift in forward direction.
(C) Equilibrium constant increases since concentration of products increases.
(D) Equilibrium constant remains unchanged as concentration of reactants and products remain same.
Choose the correct answer from the options given below :
- ✓(A) and (B) only
- B(A), (B) and (D) only
- C(B) and (C) only
- D(A), (B) and (C) only
Answer
View full question & answer→Correct option: A.
(A) and (B) only
(A) (A) and (B) only
MCQ 164 Marks
Which among the following halides will generate the most stable carbocation in Nucleophillic substitution reaction?
- A
- B
- C
- ✓
Answer
View full question & answer→Correct option: D.
(D)
Sol. Stability order of carbocation
Sol. Stability order of carbocation
MCQ 174 Marks
Identify the essential amino acids from below :
(A) Valine
(B) Proline
(C) Lysine
(D) Threonine
(E) TyrosineChoose the correct answer from the options given below :
(A) Valine
(B) Proline
(C) Lysine
(D) Threonine
(E) TyrosineChoose the correct answer from the options given below :
- ✓(A), (C) and (D) only
- B(A), (C) and (E) only
- C(B),(C) and (E) only
- D(C),(D) and (E) only
Answer
View full question & answer→Correct option: A.
(A), (C) and (D) only
(A) (A), (C) and (D) only
Sol. Valine, Lysine and Threonine are essential amino acids.
Sol. Valine, Lysine and Threonine are essential amino acids.
MCQ 184 Marks
Given below are two statements :Statement (I) : In partition chromatography, stationary phase is thin film of liquid present in the inert support.
Statement (II) : In paper chromatography, the material of paper acts as a stationary phase.
In the light of the above statements, choose the correct answer from the options given below :
Statement (II) : In paper chromatography, the material of paper acts as a stationary phase.
In the light of the above statements, choose the correct answer from the options given below :
- ABoth Statement I and Statement II are false
- ✓Statement I is true but Statement II is false
- CBoth Statement I and Statement II are true
- DStatement I is false but Statement II is true
Answer
View full question & answer→Correct option: B.
Statement I is true but Statement II is false
(B) Statement I is true but Statement II is false
Sol. Statement I is true.
In partition chromatography, stationary phase is thin liquid film present in the inert support.
Statement II is false.
Because stationary phase in paper chromatography is water.
Sol. Statement I is true.
In partition chromatography, stationary phase is thin liquid film present in the inert support.
Statement II is false.
Because stationary phase in paper chromatography is water.
MCQ 194 Marks
For hydrogen like species, which of the following graphs provides the most appropriate representation of E vs Z plot for a constant n ?
[ $E :$ : Energy of the stationary state,
Z : atomic number, $n =$ principal quantum number]
[ $E :$ : Energy of the stationary state,
Z : atomic number, $n =$ principal quantum number]
- A
- ✓
- C
- D
Answer
View full question & answer→Correct option: B.
(B)
MCQ 204 Marks
The calculated spin-only magnetic moments of $K _3\left[ Fe ( OH )_6\right]$ and $K _4\left[ Fe ( OH )_6\right]$ respectively are :
- A4.90 and 4.90 B.M.
- ✓5.92 and 4.90 B.M.
- C3.87 and 4.90 B.M.
- D4.90 and 5.92 B.M.
Answer
View full question & answer→Correct option: B.
5.92 and 4.90 B.M.
(B) 5.92 and 4.90 B.M.