CBSE Class 12 Chemistry 2023 question paper (56/1)

1. A.
   Osmotic pressure
2. B.
   Depression in freezing point
3. C.
   Relative lowering in vapour pressure
4. D.
   Elevation is boiling point

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1. A.
   high atmospheric pressure
2. B.
   low temperature
3. C.
   low atmospheric pressure
4. D.
   both low temperature and high atmospheric pressure

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1. A.
   $2\mathrm{Ag} \mid \mathrm{Ag}^{+} \parallel \mathrm{Zn} \mid \mathrm{Zn}^{2+}$
2. B.
   $\mathrm{Ag}^{+} \mid \mathrm{Ag} \parallel \mathrm{Zn}^{2+} \mid \mathrm{Zn}$
3. C.
   $\mathrm{Ag} \mid \mathrm{Ag}^{+} \parallel \mathrm{Zn} \mid \mathrm{Zn}^{2+}$
4. D.
   $\mathrm{Zn} \mid \mathrm{Zn}^{2+} \parallel \mathrm{Ag}^{+} \mid \mathrm{Ag}$

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1. A.
   positive, negative
2. B.
   negative, negative
3. C.
   negative, positive
4. D.
   positive, positive

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1. A.
   $\Delta \mathrm{H}$
2. B.
   $\Delta \mathrm{G}$
3. C.
   $\mathrm{E}_{\mathrm{a}}$
4. D.
   $\Delta \mathrm{S}$

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1. A.
   2
2. B.
   1
3. C.
   0
4. D.
   3

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1. A.
   + 2
2. B.
   + 3
3. C.
   + 4
4. D.
   + 6

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1. A.
   optical isomerism
2. B.
   linkage isomerism
3. C.
   ionisation isomerism
4. D.
   coordination isomerism

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1. A.
   Free radicals
2. B.
   Swartz reaction
3. C.
   Sandmeyer reaction
4. D.
   Finkelstein reaction

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1. A.
   $1^{\circ} < 2^{\circ} < 3^{\circ}$
2. B.
   $1^{\circ} > 3^{\circ} > 2^{\circ}$
3. C.
   $1^{\circ} > 2^{\circ} > 3^{\circ}$
4. D.
   $3^{\circ} > 1^{\circ} > 2^{\circ}$

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1. A.
   $\mathrm{CH_3COONa}$
2. B.
   $\mathrm{CH_3NH_2}$
3. C.
   $\mathrm{CH_3CH_2Br}$
4. D.
   $\mathrm{CH_3CH_2NH_2}$

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1. A.
   $\mathrm{(CH_3)_2NH}$
2. B.
   $\mathrm{NH_3}$
3. C.
   $\mathrm{C_6H_5NH_2}$
4. D.
   $\mathrm{(CH_3)_3N}$

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1. A.
   $\mathrm{C_1 - C_6}\ \alpha$ linkage
2. B.
   $\mathrm{C_1 - C_6}\ \beta$ linkage
3. C.
   $\mathrm{C_1 - C_4}\ \alpha$ linkage
4. D.
   $\mathrm{C_1 - C_4}\ \beta$ linkage

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1. A.
   Sucrose
2. B.
   Starch
3. C.
   Polypeptides
4. D.
   Nucleotides

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1. A.
   Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
2. B.
   Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
3. C.
   Assertion (A) is true, but Reason (R) is false.
4. D.
   Assertion (A) is false, but Reason (R) is true.

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1. A.
   Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
2. B.
   Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
3. C.
   Assertion (A) is true, but Reason (R) is false.
4. D.
   Assertion (A) is false, but Reason (R) is true.

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1. A.
   Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
2. B.
   Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
3. C.
   Assertion (A) is true, but Reason (R) is false.
4. D.
   Assertion (A) is false, but Reason (R) is true.

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1. A.
   Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
2. B.
   Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
3. C.
   Assertion (A) is true, but Reason (R) is false.
4. D.
   Assertion (A) is false, but Reason (R) is true.

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1. A.
   Sucrose
2. B.
   Starch
3. C.
   Polypeptides
4. D.
   Nucleotides

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1. A.
   $\mathrm{C_1 - C_6}\ \alpha$ linkage
2. B.
   $\mathrm{C_1 - C_6}\ \beta$ linkage
3. C.
   $\mathrm{C_1 - C_4}\ \alpha$ linkage
4. D.
   $\mathrm{C_1 - C_4}\ \beta$ linkage

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1. A.
   $1{\cdot}6$ V
2. B.
   $-\,1{\cdot}16$ V
3. C.
   $2{\cdot}04$ V
4. D.
   $1{\cdot}24$ V

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1. A.
   $2{\cdot}5 \times 10^{-3}\ \mathrm{min^{-1}}$
2. B.
   $2{\cdot}75 \times 10^{-4}\ \mathrm{min^{-1}}$
3. C.
   $1{\cdot}25 \times 10^{-3}\ \mathrm{min^{-1}}$
4. D.
   $2{\cdot}31 \times 10^{-3}\ \mathrm{min^{-1}}$

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1. A.
   $\mathrm{(CH_3)_2NH}$
2. B.
   $\mathrm{NH_3}$
3. C.
   $\mathrm{C_6H_5NH_2}$
4. D.
   $\mathrm{(CH_3)_3N}$

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1. A.
   $\mathrm{CH_3COONa}$
2. B.
   $\mathrm{CH_3NH_2}$
3. C.
   $\mathrm{CH_3CH_2Br}$
4. D.
   $\mathrm{CH_3CH_2NH_2}$

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1. A.
   $1^{\circ} < 2^{\circ} < 3^{\circ}$
2. B.
   $1^{\circ} > 3^{\circ} > 2^{\circ}$
3. C.
   $1^{\circ} > 2^{\circ} > 3^{\circ}$
4. D.
   $3^{\circ} > 1^{\circ} > 2^{\circ}$

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1. A.
   Osmotic pressure
2. B.
   Depression in freezing point
3. C.
   Relative lowering in vapour pressure
4. D.
   Elevation is boiling point

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1. A.
   high atmospheric pressure
2. B.
   low temperature
3. C.
   low atmospheric pressure
4. D.
   both low temperature and high atmospheric pressure

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1. A.
   $\Delta \mathrm{H}$
2. B.
   $\Delta \mathrm{G}$
3. C.
   $\mathrm{E}_{\mathrm{a}}$
4. D.
   $\Delta \mathrm{S}$

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1. A.
   optical isomerism
2. B.
   linkage isomerism
3. C.
   ionisation isomerism
4. D.
   coordination isomerism

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1. A.
   Free radicals
2. B.
   Swartz reaction
3. C.
   Sandmeyer reaction
4. D.
   Finkelstein reaction

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1. A.
   + 2
2. B.
   + 3
3. C.
   + 4
4. D.
   + 6

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1. A.
   2
2. B.
   1
3. C.
   0
4. D.
   3

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1. A.
   Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
2. B.
   Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
3. C.
   Assertion (A) is true, but Reason (R) is false.
4. D.
   Assertion (A) is false, but Reason (R) is true.

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1. A.
   Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
2. B.
   Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
3. C.
   Assertion (A) is true, but Reason (R) is false.
4. D.
   Assertion (A) is false, but Reason (R) is true.

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1. A.
   Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
2. B.
   Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
3. C.
   Assertion (A) is true, but Reason (R) is false.
4. D.
   Assertion (A) is false, but Reason (R) is true.

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1. A.
   Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
2. B.
   Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
3. C.
   Assertion (A) is true, but Reason (R) is false.
4. D.
   Assertion (A) is false, but Reason (R) is true.

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1. A.
   Powdered salt in cold water
2. B.
   Powdered salt in hot water
3. C.
   Salt crystals in cold water
4. D.
   Salt crystals in hot water

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1. A.
   atomic number
2. B.
   shielding by 4f electrons
3. C.
   effective nuclear charge
4. D.
   atomic radius

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1. A.
   $\mathrm{CH_3COONa}$
2. B.
   $\mathrm{CH_3NH_2}$
3. C.
   $\mathrm{CH_3CH_2Br}$
4. D.
   $\mathrm{CH_3CH_2NH_2}$

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1. A.
   $1^{\circ} < 2^{\circ} < 3^{\circ}$
2. B.
   $1^{\circ} > 3^{\circ} > 2^{\circ}$
3. C.
   $1^{\circ} > 2^{\circ} > 3^{\circ}$
4. D.
   $3^{\circ} > 1^{\circ} > 2^{\circ}$

Tap an option to check your answer.

1. A.
   optical isomerism
2. B.
   linkage isomerism
3. C.
   ionisation isomerism
4. D.
   coordination isomerism

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1. A.
   $\mathrm{(CH_3)_2NH}$
2. B.
   $\mathrm{NH_3}$
3. C.
   $\mathrm{C_6H_5NH_2}$
4. D.
   $\mathrm{(CH_3)_3N}$

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1. A.
   $\mathrm{C_1 - C_6}\ \alpha$ linkage
2. B.
   $\mathrm{C_1 - C_6}\ \beta$ linkage
3. C.
   $\mathrm{C_1 - C_4}\ \alpha$ linkage
4. D.
   $\mathrm{C_1 - C_4}\ \beta$ linkage

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1. A.
   2
2. B.
   1
3. C.
   0
4. D.
   3

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1. A.
   $\mathrm{Cl^{-}}$
2. B.
   $\mathrm{AlCl_4^{-}}$
3. C.
   $\mathrm{AlCl_3}$
4. D.
   $\mathrm{Cl^{+}}$

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1. A.
   + 2
2. B.
   + 3
3. C.
   + 4
4. D.
   + 6

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1. A.
   $2\mathrm{Ag} \mid \mathrm{Ag}^{+} \parallel \mathrm{Zn} \mid \mathrm{Zn}^{2+}$
2. B.
   $\mathrm{Ag}^{+} \mid \mathrm{Ag} \parallel \mathrm{Zn}^{2+} \mid \mathrm{Zn}$
3. C.
   $\mathrm{Ag} \mid \mathrm{Ag}^{+} \parallel \mathrm{Zn} \mid \mathrm{Zn}^{2+}$
4. D.
   $\mathrm{Zn} \mid \mathrm{Zn}^{2+} \parallel \mathrm{Ag}^{+} \mid \mathrm{Ag}$

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1. A.
   positive, negative
2. B.
   negative, negative
3. C.
   negative, positive
4. D.
   positive, positive

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1. A.
   $\Delta \mathrm{H}$
2. B.
   $\Delta \mathrm{G}$
3. C.
   $\mathrm{E}_{\mathrm{a}}$
4. D.
   $\Delta \mathrm{S}$

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1. A.
   Sucrose
2. B.
   Maltose
3. C.
   Glucose
4. D.
   Lactose

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1. A.
   Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
2. B.
   Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
3. C.
   Assertion (A) is true, but Reason (R) is false.
4. D.
   Assertion (A) is false, but Reason (R) is true.

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1. A.
   Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
2. B.
   Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
3. C.
   Assertion (A) is true, but Reason (R) is false.
4. D.
   Assertion (A) is false, but Reason (R) is true.

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1. A.
   Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
2. B.
   Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
3. C.
   Assertion (A) is true, but Reason (R) is false.
4. D.
   Assertion (A) is false, but Reason (R) is true.

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1. A.
   Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
2. B.
   Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
3. C.
   Assertion (A) is true, but Reason (R) is false.
4. D.
   Assertion (A) is false, but Reason (R) is true.

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