JAMB - Chemistry (1979 - No. 27)
Calcium hydroxide and ammonium chloride when heated together will give an important product. This compound may be obtained dry by
dissolving it in water, recrystallizing it and then drying in the oven
passing it through a concentrated aqueous solution of sodium hydroxide
passing it through calcium oxide
passing it through concentrated sulphuric acid
passing it through anhydrous calcium choride