A small quantity of solid ammonium chloride(NH₄Cl) was heated gently in a test tube. The solid gradually disappear to produce a mixture of two gases later a white cloudy deposit was observed on the cooler part of the test tube. The ammonium chloride is said to have undergone.

• A.distillation
• B.sublimation
• C.precipitation
• D.evaporation
• E.decomposition