Two statements are given. One is labeled as ‘Assertion’(A) and the other is labeled as Reason (R). Select the correct answer to the questions from code (i), (ii), (iii) and (iv) as given.
Assertion(A) - The volume of gases decreases when the temperature is lowered.
Reason (R) - Kinetic energy of gas molecules decreases when its temperature is lowered.

Both ‘A’ and ‘R’ are true and ‘R’ is the correct explanation for ‘A’.

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Both ‘A’ and ‘R’ are true and ‘R’ is not a correct explanation for ‘A’.

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‘A’ is true and ‘R’ is false.

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‘A’ is false and ‘R’ is true.

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Solution

The correct option is A
Both ‘A’ and ‘R’ are true and ‘R’ is the correct explanation for ‘A’.

Explanation for Assertion statement
The particles of gases are far away from each other.
At higher temperatures they're more spread out and kinetic energy is increased.
Explanation for Reason statement
When the temperature is lowered, the kinetic energy of gaseous particles is decreased.
The particles of gases are far away from each other and concentrated mostly in the lowest available energy levels,
Therefore option (a) is the correct answer.

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