Question

The mixture of concentrated HCl and HNO3 made in 3:1 ratio contains :
A) ClO2
B) NOCl
C) NCl3
D) N2O4

Answer 1

Hi.

The rxn of conc HCl and HNO3 in ratio 3:1 prepares a special solution which is used in cleaning gold ornaments. This solution is strong enough to react with gold and platinum the most passive elements of periodic table.

Now back to the question, the compound formed is NOCl.

Hence b)

Answer 2

B) HNO3 + 3HCl -> NOCl + 2 H20 + 2Cl