1.

Assertion : LiquidNH_3is used for refrigeration Reasong: Liquid NH_3quickly vaporises.

Answer»

if both assertion and reason are true and reason is thr CORRECT EXPLANATIONOF assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reson are false.

SOLUTION :Liq `NH_3` has high heat heart of vaporisation `(327 CAL //g )` so.it is takes up lots of heat and helps in COOLING. So it is use d ice- plants.


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