Question

When gas C is mixed with gas B, dense white fumes are seen and there is no other product. What is the name of gas C?

[Note : Gas B turns moist red litmus paper blue].

• A. $N{H}_3$
• B. $C{l}_2$
• C. $HCl$
• D. $S{O}_2$

Answer 1

Answer: (C)

$HCl$

Gas C is Hydrochloric acid. Gas B is ammonia. When ammonia gas is mixed with hydrochloric acid in the air dense white fumes of ammonium chloride are formed. Gas B is basic in nature which turns red litmus paper blue which is ammonia.