Heating solid ammonium chloride involves change in the ___________.

Options

A. physical state only.
B. physical state as well as chemical composition.
C. colour only.
D. both colour and volume only

Answer

b

Explanation

`NH_4Cl_((s)) overset(Delta) to NH_4 Cl_((g)) overset(Delta) to NH_(3(g)) + HCl_((g))`
It involves both sublimation (physical change) and chemical decomposition (chemical change)