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प्रश्न
Assertion (A): Liquid ammonia is used as a refrigerant.
Reason (R): Liquid ammonia is not volatile.
पर्याय
If both A and R are true, and R is the correct explanation of A.
If both A and R are true, and R is the correct explanation of A.
If A is true, but R is false.
If both A and R are false.
MCQ
विधान आणि तर्क
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उत्तर
If A is true, but R is false.
Explanation:
The assertion is true because liquid ammonia has an exceptionally high latent heat of vaporisation (327 cal/g), making it an excellent refrigerant that absorbs a massive amount of heat as it evaporates. However, the reason is completely false because ammonia is a highly volatile liquid that boils at a very low temperature (−33.34°C).
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