Calcium hydroxide and ammonium chloride when heated together will give an important product. This compound may be obtained dry by
-
A.
dissolving it in water, recrystallizing it and then drying in the oven -
B.
passing it through a concentrated aqueous solution of sodium hydroxide -
C.
passing it through calcium oxide -
D.
passing it through concentrated sulphuric acid -
E.
passing it through anhydrous calcium choride