Assertion and Reason

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21 Assertion (A) : Water kept in earthen pots gets cooled in summer.
Reason (R) : Evaporation causes cooling.

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.
D
A is false but R is true.

22 Assertion (A) : Buddha left home after his marriage.
Reason (R) : He wished to be free of all worldly ties and become an ascetic.

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.
D
A is false but R is true.

23 Assertion (A) : The freezing of sea water during winter does not kill the fishes.
Reason (R) : Only surface water is frozen.

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.
D
A is false but R is true.

24 Assertion (A) : Rive r Narmad a flows westward.
Reason (R) : Narmad a falls into the Ba y o f Bengal.

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.
D
A is false but R is true.

25 Assertion (A) : Clothes are not washed properly in hard water. Reason (A) : Hard water contains many minerals.

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.
D
A is false but R is true.

26 Assertion (A) : Gandhiji withdrew the non-cooperation movement.
Reason (R) : There was violence at the Chauri Chaura outrage.

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.
D
A is false but R is true.

27 Assertion (A) : Red colour of blood is due to haemoglobin.
Reason (R) : Haemoglobin is a red pigment.

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.
D
A is false but R is true.

28 Assertion (A) : The steam engine was invented by James Watt.
Reason (R) : There was a problem of taking out water from flooded mines.

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.
D
A is false but R is true.

29 Assertion (A) : Salt is added to cook food at higher altitudes.
Reason (R) : Temperature is lower at higher altitudes.

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.
D
A is false but R is true.

30 Assertion (A) s Leakages in household gas cylinders can be detected.
Reason (R) : LPG has a strong smell.

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.
D
A is false but R is true.