A solution which is 10^ - 3 M each in M n^ 2 + , ,F e^ 2 + , ,Z n… - Vidyadip

MCQ

A solution which is ${10^{ - 3}}M$ each in $M{n^{2 + }},\,F{e^{2 + }},\,Z{n^{2 + }}$ and $H{g^{2 + }}$ is treated with ${10^{ - 16}}M$ sulphide ion. If ${K_{sp}}$ of $MnS,\,FeS,\,ZnS$ and $HgS$ are ${10^{ - 15}},\,{10^{ - 23}},\,{10^{ - 20}}$ and ${10^{ - 54}}$ respectively, which one will precipitate first

A
$FeS$
B
$MgS$
✓
$HgS$
D
$ZnS$

✓

Answer

Correct option: C.

$HgS$

c
Ionic product in the solution $=10^{-3} \times 10^{-16}=10^{-19}$. The metal sulphide having the lowest solubility will precipitate first provided the ionic product is higher than the $K_{\text {sp. }}$. Here, all salts are of the same valence type. So, the sulphide having the lowest $K_{s p}$ value will precipitate first provided $K_{s p}\,<\,10^{-19}$. HgS has the lowest $K _{\text {sp }}$ value $\left(10^{-54}\right)$, so it will precipitate first.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from 6.2. Equilibrium - II (icon Equilibrium)→6.2. Equilibrium - II (icon Equilibrium) — all question types→Chemistry STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

Product $(P)$ is

Which of the statements below best describes a functional group?

Heavy water is obtained by :

Elements upto atomic number $103$ have been synthesized and studied. If a newly discovered element is found to have an atomic number $106,$ its electronic configuration will be

Which of the following property of an element never changes?

If solubility product of $HgS{O_4}$ is $6.4 \times {10^{ - 5}}$, then its solubility is

$\ce{B_2H_6}$ on heating with $\ce{NH_3}$ gases gives:

The ionization energies from $\ce{Ga}$ to $\ce{Tl}$ do not decrease due to :

The first ionisation potential is maximum for

Which of the following expression is correct for a reversible process in a state of equilibrium?