CBSE 12 Chemistry Question Paper-2024 Set-5 by Pavan | Practice Test to Test Your Knowledge
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  3. CBSE 12 Chemistry Question Paper-2024 Set-5
CBSE 12 Chemistry Question Paper-2024 Set-5

CBSE 12 Chemistry Question Paper-2024 Set-5

This mock test includes actual CBSE Class 12 Chemistry board exam questions from the year 2024 Set-5, helping students understand exam trends and practice real paper format

2025-08-17
Pavan Pavan
CBSE Class 12 Chemistry 2024 Grade 12

Duration

30 min

Questions

30

Marking

Negative

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Questions Preview

Which of the following species can act as the strongest base?

A
$C_{6}H_{5}O^{-}$
B
$O_{2}N$
C
$RO^{-}$
D
$OH^{-}$

Auto-oxidation of chloroform in air and light produces a poisonous gas known as

A
Phosgene
B
Phosphine
C
Mustard gas
D
Tear gas

Isotonic solutions have the same

A
volume
B
density
C
osmotic pressure
D
refractive index

The specific sequence in which amino acids are arranged in a protein is called its

A
Secondary structure
B
Primary structure
C
Quaternary structure
D
Tertiary structure

Transition metals are known to make interstitial compounds. Formation of interstitial compounds makes the transition metal

A
more soft
B
more ductile
C
more metallic
D
more hard

The correct name of the given reaction is Ar-$N_2^+X^-$ + HBr/Cu powder -> Ar-Br + $N_2$.

A
Gatterman reaction
B
Hoffmann Bromamide degradation reaction
C
Carbyl amine reaction
D
Gabriel Phthalimide synthesis

Visha took 4 test-tubes namely A, B, C & D containing $CH_{3}CH=CH_{2}$, $CH_{3}CH_{2}CH=CH_{2}$, $CH_{3}CH=CH-CH_{3}$ and $(CH_{3}){2}C=CH{2}$ respectively and tried to convert them into tertbutylalcohol. She carried out acid catalysed hydration reaction on every alkene. Out of the four test-tubes, the one which will give desired result is

A
B
B
C
C
A
D
D

Van't Hoff factor for KCl solution assuming the complete dissociation is

A
2
B
1
C
1.5
D
0.5

Dilution affects both molar conductivity as well as conductivity. Effect of dilution on both is

A
both increase with dilution.
B
molar conductivity increases whereas conductivity decreases on dilution.
C
both decrease with dilution.
D
molar conductivity decreases whereas conductivity increases on dilution.

Which of the following cell is used in inverter ?

A
Lead storage cell
B
Fuel cell
C
Mercury cell
D
Dry cell

In which of the following molecules, C atom marked with asterisk is chiral?

A
II, III, IV
B
I, II, III, IV
C
I, III, IV
D
I, II, III

For the reaction $A+2B\rightarrow C+D$ The order of the reaction is

A
can't be predicted as order is determined experimentally.
B
2 with respect to B
C
3
D
1 with respect to A

Assertion (A): p-nitrophenol is a stronger acid than p-methoxyphenol. Reason (R): The methoxy group shows +I effect while the nitro group shows -I effect.

A
Both Assertion (A) and Reason (R) are correct, but Reason (R) is not the correct explanation of Assertion (A).
B
Assertion (A) is correct, but Reason (R) is incorrect.
C
Assertion (A) is incorrect, but Reason (R) is correct.
D
Both Assertion (A) and Reason (R) are correct and Reason (R) is the correct explanation of Assertion (A).

Assertion (A): For a zero order reaction, the units of rate constant and rate of reaction are same. Reason (R): In a zero order reaction, the rate of reaction does not depend on the concentration of the reactants.

A
Both Assertion (A) and Reason (R) are correct and Reason (R) is the correct explanation of Assertion (A).
B
Both Assertion (A) and Reason (R) are correct, but Reason (R) is not the correct explanation of Assertion (A).
C
Assertion (A) is correct, but Reason (R) is incorrect.
D
Assertion (A) is incorrect, but Reason (R) is correct.

Assertion (A): In SN2 reaction, inversion of configuration is observed. Reason (R): The reaction proceeds with the formation of a carbocation.

A
Assertion (A) is incorrect, but Reason (R) is correct.
B
Both Assertion (A) and Reason (R) are correct and Reason (R) is the correct explanation of Assertion (A).
C
Both Assertion (A) and Reason (R) are correct, but Reason (R) is not the correct explanation of Assertion (A).
D
Assertion (A) is correct, but Reason (R) is incorrect.

The specific sequence in which amino acids are arranged in a protein is called its

A
Quaternary structure
B
Primary structure
C
Tertiary structure
D
Secondary structure

The correct name of the given reaction is Ar-$N_{2}^{+}X^{-}$ + CuCN/KCN -> Ar-CN + $N_{2}$

A
Sandmeyer's reaction
B
Hoffmann bromamide degradation reaction
C
Carbyl amine reaction
D
Gabriel Phthalimide synthesis

Out of the following alkenes, the one which will produce tertiary butyl alcohol on acid catalysed hydration is

A
$CH_{3}CH=CH_{2}$
B
$CH_{3}CH_{2}CH=CH_{2}$
C
$(CH_{3})_{2}C=CH_{2}$
D
$CH_{3}-CH=CH-CH_{3}$

Auto-oxidation of chloroform in air and light produces a poisonous gas known as

A
Tear gas
B
Phosgene
C
Phosphine
D
Mustard gas

Transition metals are known to make interstitial compounds. Formation of interstitial compounds makes the transition metal

A
more ductile
B
more soft
C
more hard
D
more metallic

Isotonic solutions have the same

A
volume
B
refractive index
C
osmotic pressure
D
density

Which of the following cell was used in Apollo space programme?

A
Ni-Cd cell
B
Mercury cell
C
H2-O2 fuel cell
D
Dry cell

The rate of a reaction increases sixteen times when the concentration of the reactant increases four times. The order of the reaction is

A
2.5
B
0.5
C
2.0
D
1.5

In which of the following molecules, C atom marked with asterisk is chiral?

A
I, II, III, IV
B
I, II, III
C
II, III, IV
D
I, III, IV

Which of the following species can act as the strongest base?

A
$RO^{-}$
B
$OH^{-}$
C
$C_{6}H_{5}O^{-}$
D
$O_{2}N$

Dilution affects both conductivity as well as molar conductivity. Effect of dilution on both is as follows:

A
conductivity increases whereas molar conductivity decreases on dilution.
B
both decrease with dilution.
C
both increase with dilution.
D
conductivity decreases whereas molar conductivity increases on dilution.

Van't Hoff factor for $Na_{2}SO_{4}\cdot10H_{2}O$ solution, assuming complete ionization is

A
1
B
2
C
13
D
3

Assertion (A): Zr and Hf have almost similar atomic radii. Reason (R): This is due to lanthanoid contraction.

A
Assertion (A) is incorrect, but Reason (R) is correct.
B
Both Assertion (A) and Reason (R) are correct, but Reason (R) is not the correct explanation of Assertion (A).
C
Both Assertion (A) and Reason (R) are correct and Reason (R) is the correct explanation of Assertion (A).
D
Assertion (A) is correct, but Reason (R) is incorrect.

Assertion (A): For a zero order reaction, the units of rate constant and rate of reaction are same. Reason (R): In a zero order reaction, the rate of reaction does not depend on the concentration of the reactants.

A
Both Assertion (A) and Reason (R) are correct, but Reason (R) is not the correct explanation of Assertion (A).
B
Both Assertion (A) and Reason (R) are correct and Reason (R) is the correct explanation of Assertion (A).
C
Assertion (A) is correct, but Reason (R) is incorrect.
D
Assertion (A) is incorrect, but Reason (R) is correct.

Assertion (A): In SN2 reaction, inversion of configuration is observed. Reason (R): The reaction proceeds with the formation of a carbocation.

A
Both Assertion (A) and Reason (R) are correct and Reason (R) is the correct explanation of Assertion (A).
B
Assertion (A) is correct, but Reason (R) is incorrect.
C
Both Assertion (A) and Reason (R) are correct, but Reason (R) is not the correct explanation of Assertion (A).
D
Assertion (A) is incorrect, but Reason (R) is correct.