CBSE 12th Chemistry Delhi Set 1 - 2023 | Class 12 Year Wise Previous Years Questions

1

CBSE 12th Chemistry Delhi Set 1 - 2023

MCQ (Single Correct Answer)

+1

-0

Hydrolysis of sucrose is called

A

inversion

B

hydration

C

esterification

D

saponification

2

CBSE 12th Chemistry Delhi Set 1 - 2023

MCQ (Single Correct Answer)

+1

-0

Which one of the following has lowest $$\mathrm{pK}_{\mathrm{a}}$$ value?

A

$$\mathrm{CH}_3-\mathrm{COOH}$$

B

$$\mathrm{O}_2 \mathrm{N}-\mathrm{CH}_2-\mathrm{COOH}$$

C

$$\mathrm{Cl}-\mathrm{CH}_2-\mathrm{COOH}$$

D

$$\mathrm{HCOOH}$$

3

CBSE 12th Chemistry Delhi Set 1 - 2023

MCQ (Single Correct Answer)

+1

-0

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

A

Mercury cell

B

Daniel cell

C

$$\mathrm{H}_2-\mathrm{O}_2$$ Fuel cell

D

Dry cell

4

CBSE 12th Chemistry Delhi Set 1 - 2023

MCQ (Single Correct Answer)

+1

-0

The following experimental rate data were obtained for a reaction carried out at $$25^{\circ} \mathrm{C}$$

$$A_{(g)}+B_{(g)} \rightarrow C_{(g)}+D_{(g)}$$

Initial $$\mathrm{[A_{(g)}]/mol~dm^{-3}}$$	Initial $$\mathrm{[B_{(g)}]/mol~dm^{-3}}$$	Initial rate/mol $$\mathrm{dm^{-3}s^{-1}}$$
$$3.0 \times 10^{-2}$$	$$2.0 \times 10^{-2}$$	$$1.89 \times 10^{-4}$$
$$3.0 \times 10^{-2}$$	$$4.0 \times 10^{-2}$$	$$1.89 \times 10^{-4}$$
$$6.0 \times 10^{-2}$$	$$4.0 \times 10^{-2}$$	$$7.56 \times 10^{-4}$$

$$\text { What are the orders with respect to } \mathrm{A}_{(\mathrm{g})} \text { and } \mathrm{B}_{(\mathrm{g})} \text { ? }$$

A

Order with respect to $$\mathrm{A_{(g)}}$$	Order with respect to $$\mathrm{B_{(g)}}$$
Zero	Second

B

Order with respect to $$\mathrm{A_{(g)}}$$	Order with respect to $$\mathrm{B_{(g)}}$$
First	Zero

C

Order with respect to $$\mathrm{A_{(g)}}$$	Order with respect to $$\mathrm{B_{(g)}}$$
Second	Zero

D

Order with respect to $$\mathrm{A_{(g)}}$$	Order with respect to $$\mathrm{B_{(g)}}$$
Second	First

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