[AFMC 1995; Pb. CET 2000]
A) $ NH_4Cl $
B) $ CaCO_3 $
C) $ BaSO_4 $
D) $ CaHPO_3 $
Correct Answer: A
When a solid compound on heating change into gaseous state without changing into liquid state, the phenomenon is known as sublimation. e.g., $ I_2,\ NH_4Cl $ and camphor.
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