Assertion (A) & Reason (B) MCQ

MCQ 11 Mark

Assertion (A): Turmeric is a natural indicator.
Reason (R): Turmeric acquires an orange colour in basic solution.

A
Both A and R are true and R is the correct explanation of A.
B
Both A and R are true but R is not the correct explanation of A.
✓
A is true but R is false.
D
A is false but R is true.

Answer

Correct option: C.

A is true but R is false.

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MCQ 21 Mark

Assertion (A): Sugar is a neutral substance.
Reason (R): A sugar solution turns red litmus blue.

A
Both A and R are true and R is the correct explanation of A.
B
Both A and R are true but R is not the correct explanation of A.
✓
A is true but R is false.
D
A is false but R is true.

Answer

Correct option: C.

A is true but R is false.

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MCQ 31 Mark

Assertion (A): Neutralisation reaction is accompanied by the absorption of heat.
Reason (R): Neutralisation reaction is a reaction between an acid and a base to form salt and water.

A
Both A and R are true and R is the correct explanation of A.
B
Both A and R are true but R is not the correct explanation of A.
C
A is true but R is false.
✓
A is false but R is true.

Answer

Correct option: D.

A is false but R is true.

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MCQ 41 Mark

Assertion (A): Adding lime to acidic soil helps plants grow.
Reason (R): Lime neutralises excess acid in the soil.

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

Answer

Correct option: A.

Both Assertion (A) and Reason (R) are true, and (R) is the correct explanation of (A).

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MCQ 51 Mark

Assertion (A): Soap solution feels slippery.
Reason (R): It is acidic in nature.

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

Answer

Correct option: C.

(A) is true, but (R) is false.

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MCQ 61 Mark

Assertion (A): Onion can be used to detect acids.
Reason (R): It changes odour in basic medium.

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

Answer

Correct option: B.

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

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MCQ 71 Mark

Assertion (A): Turmeric changes to red in bases.
Reason (R): Bases are sour in taste.

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

Answer

Correct option: C.

(A) is true, but (R) is false.

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MCQ 81 Mark

Assertion (A): A neutralisation reaction produces salt and water.
Reason (R): It is a reaction between an acid and a base.

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

Answer

Correct option: A.

Both Assertion (A) and Reason (R) are true, and (R) is the correct explanation of (A).

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Science Assertion (A) & Reason (B) MCQ

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