1.

A block of ice at `-20^(@)C` having a mass of 2kg is added to a 3kg water at `15^(@)C`. Neglecting heat losses and the heat capacity of the containerA. The final temperature will be less than `0^(@)C`B. Ice will completely meltC. Water will partially freezeD. Final temperature will be more than `0^(@)C`

Answer» Correct Answer - 3
`Q_(reqd) =2000xx1/2 xx(0-20) =20000 cal`
`Q_(av)=3000xx1xx (15-0) =45000 cal`
`Q_("reqd to melt")=2000xx80 =160000`
`to ` not sufficient


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