1
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
2
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
3
CBSE 12th Chemistry Delhi Set 1 - 2023
MCQ (Single Correct Answer)
+1
-0

The magnetic moment of $$\left[\mathrm{NiCl}_4\right]^{2-}$$

[Atomic number : $$\mathrm{Ni}=28$$ ]

A
$$1.82 \mathrm{~BM}$$
B
$$2.82 \mathrm{~BM}$$
C
$$4.42 \mathrm{~BM}$$
D
$$5.46 \mathrm{~BM}$$
4
CBSE 12th Chemistry Delhi Set 1 - 2023
MCQ (Single Correct Answer)
+1
-0

Assertion (A): Proteins are polymers of $$\alpha$$-amino acids connected by a peptide bond.

Reason (R): A tetrapeptide contains 4 amino acids linked by 4 peptide bonds.

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