Question

Yellow ppt of compound $\left(I\right)$ is insoluble in:

• A. $NaOH$
• B. $C{H}_{3}COOH$
• C. Dil. $HN{O}_3$
• D. None of these

Answer 1

The correct option is B $C{H}_{3}COOH$

$\underset{\left(A\right)}{2Pb(N{O}_3{)}_2}\stackrel{\Delta }{\to }2PbO+\underset{\left(B\right)}{4N{O}_2\uparrow }+O_2\uparrow \underset{\left(A\right)}{Pb(N{O}_3{)}_2}+H_{2}S\to \underset{\left(F\right)}{PbS\downarrow }\underset{\left(F\right)}{PbS}+dil.HN{O}_3\to Pb(N{O}_3{)}_2+\underset{\left(H\right)}{NO\uparrow }+\underset{\left(G\right)}{H_{2}O}\underset{\left(A\right)}{Pb(N{O}_3{)}_2}+K_{2}Cr{O}_4\to \underset{\left(I\right)}{PbCr{O}_4\downarrow }+2KN{O}_3\underset{\left(B\right)}{N{O}_2}+\underset{\left(H\right)}{NO}\stackrel{\text{very low temp.}}{\to }\underset{\left(C\right)}{N_2{O}_3}\underset{\left(C\right)}{N_2{O}_3}+H_{2}O\to \underset{\left(D\right)}{2HN{O}_2}\underset{\left(D\right)}{2HN{O}_2}+2FeS{O}_4+H_{2}S{O}_4\to F{e}_2(S{O}_4{)}_3+2NO+2H_{2}OFeS{O}_4+NO\to \underset{\left(E\right)}{\left[Fe\right(H_{2}O{)}_{5}NO]S{O}_4}$

$\underset{\left(I\right)}{PbCr{O}_4}+4NaOH\to \underset{\text{Soluble}}{N{a}_2\left[Pb\right(OH{)}_4]}+N{a}_{2}Cr{O}_4\underset{\left(I\right)}{2PbCr{O}_4}+4HN{O}_3\to \underset{\text{Soluble}}{Pb(N{O}_3{)}_2}+H_{2}C{r}_2{O}_7+H_{2}O$