Q.

Solid CO2 is known as dry ice, because

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a

It evaporates at -78°C without melting

b

It melts at 0°C

c

It evaporates at 40°C

d

Its boiling point is more than 199°C

answer is C.

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Detailed Solution

Solid CO2 is known as dry ice because it evaporates at -78°C without changing in the liquid state.

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