Q. A solid (A) which has photographic effect reacts with the solution of a sodium salt (B) to give a pale yellow ppt. (C). Sodium salt on heating gives brown vapours. Identify A, B and C .
A) ${AgNO}_{3},\ NaBr,\ AgBr$
B) ${AgNO}_{3},\ NaCl,\ {AgCl}_{2}$
C) ${AgNO}_{3},\ NaBr,\ {AgCl}_{2}$
D) $AgCl,\ NaBr,\ {AgBr}_{2}$
Explanation
(a)
A solid ${\lbrack AgNO}_{3}(A)\rbrack$silver nitrate which has photographic effects reacts with the solution of NaBr(B) to give a pale yellow ppt. of AgBr which is difficulty soluble in ${NH}_{4}OH\ .\ NaBr\ (B)$ on heating gives brown vapours of bromine.
${AgNO}_{3} + NaBr\ \longrightarrow AgBr + {NaNO}_{3}$
‘$A$’ ‘$B$’ ‘$C$’
light yellow ppt.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.