Assertion (A) & Reason (B) MCQ

MCQ 11 Mark

Assertion $(A)$ : Permanent hardness of water is removed by treatment with washing soda.
Reason $(R)$ : Washing soda reacts with soluble magnesium and calcium sulphate to form insoluble carbonates.

✓
$A$ and $R$ both are correct, and $R$ is the correct explanation of $A.$
B
$A$ and $R$ both are correct, but $R$ is not the correct explanation of $A$.
C
$A$ is true but $R$ is false.
D
$A$ and $R$ both are false.

Answer

Correct option: A.

$A$ and $R$ both are correct, and $R$ is the correct explanation of $A.$

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MCQ 21 Mark

Direction in the following Questions, the Assertion and Reason have been put forward. Read the statements carefully and choose the correct alternative from the following:
Assertion : $10$ vol $\mathrm{H}_2 \mathrm{O}_2$ gives $10\ ml$ of $\mathrm{O}_2$ at $\text{STP}$
Reason : $10$ vol $\mathrm{H}_2 \mathrm{O}_2$ is $3.03 \%$ and $0.89 M .$

A
Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
✓
Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C
Assertion is true but Reason is false.
D
Both Assertion and Reason are false.

Answer

Correct option: B.

Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.

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MCQ 31 Mark

Assertion $(A)$ : Some metals like platinum and palladium, can be used as storage media for hydrogen.
Reason $(R)$ : Platinum and palladium can absorb large volumes of hydrogen.

✓
$A$ and $R$ both are correct, and $R$ is the correct explanation of $A.$
B
$A$ and $R$ both are correct, but $R$ is not the correct explanation of $A$.
C
$A$ is true but $R$ is false.
D
$A$ and $R$ both are false.

Answer

Correct option: A.

$A$ and $R$ both are correct, and $R$ is the correct explanation of $A.$

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MCQ 41 Mark

Direction in the following Questions, the Assertion and Reason have been put forward. Read the statements carefully and choose the correct alternative from the following:
Assertion : The density of Heavy water is higher of $11.2^\circ C.$
Reason : The density of water is higher is at $4^\circ C.$

A
Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
✓
Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C
Assertion is true but Reason is false.
D
Both Assertion and Reason are false.

Answer

Correct option: B.

Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.

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Chemistry Assertion (A) & Reason (B) MCQ

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