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Question

Solid CO2 is known as dry ice because :

A
it melts at 0oC
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B
its b.p. is more than 199oC
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C
it evaporates at 78oC without melting
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D
none of the above
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Solution

The correct option is C it evaporates at 78oC without melting
Dry ice is actually solid carbon dioxide. It is called dry ice because on solidification it gives an appearance similar to that of ice. It evaporated at 780C without melting.

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