Q13 of 50 Page 1

Complete the following chemical equations.

(a) NH4Cl (aq.) + NaNO2 (aq.)


(b) P4 + 3NaOH + 3H2O

(a) In laboratory, dinitrogen or nitrogen gas can be obtained by the reaction of ammonium chloride and sodium nitrite. The reaction is as follows:

NH4Cl (aq.) + NaNO2 (aq.) → N2 + 2H2O + NaCl


(b) When phosphorous is boiled with sodium hydroxide, a colorless and poisonous gas phosphine is formed and it gets liberated off. The reaction is as follows:


P4 + 3NaOH + 3H2O → PH3 + 3NaH2PO2


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