Q. During $AgNO_{3}$ test for detection of halogens, sodium extract is boiled with few drops of conc. $HNO_{3}$ to decompose
A) $NaCN$
B) $Na_{2}S$
C) Both (a) and (b)
D) None of these
Explanation
(c)
$NaCN + HNO_{3}\overset{\mathrm{\Delta}}{\rightarrow}\ HCN \uparrow + NaNO_{2}$
$Na_{2}S + HNO_{3}\overset{\mathrm{\Delta}}{\rightarrow}H_{2}S \uparrow + 2NaNO_{3}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.