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प्रश्न
Which compound is used as the cooling liquid in refrigerators?
विकल्प
Phosphine
Ammonia
Nitrous oxide
Ozone
MCQ
उत्तर
Ammonia
Explanation:
Liquid NH3 is used as a refrigerant evaporation of a liquid needs heat energy. When liquid ammonia vapourises, it absorbs large quantities of heat without changing its temperature.
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