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Liquid ammonia is used in ice factory for making ice from water. If water at 20^@C is to be converted into 2 kg ice at 0^@C , how many grams of ammonia are to be evaporated? (Given: Latent heat of vaporisation of ammonia= 341 cal/g)

Liquid ammonia 1s used in ice factory for making ice from water. If water at 30^(@)C is to be converted into 800 g ice at 0^(@)C , how many grams of ammonia are to be evaporated? (Given: Latent heat of vaporisation of ammonia = 341 cal/g)

Liquid ammonia is used in ice factory for making ice from water. If water at 20^(@)C is to be converted into 2 kg ice at 0^(@)C , how many grams of ammonia are to be evaporated ? (Given : The latent heat of vaporization of ammonia = 341 cal //g )

Name two metals which are used: (a). For making electric wires (b). For making domestic utensils and factory equipment. (c). For making jewellery and to decorate sweets.

A factory produced 1858509 cassettes in the month of January, 7623 more cassettes in the month of February and owing to short supply of electricity produced 25838 less cassettes in March than in February. Find the total production in all?