1
WB JEE 2021
MCQ (Single Correct Answer)
+1
-0.25
Change Language
Solubility products (Ksp) of the salts of types MX, MX2 and M3X at temperature T are 4.0 $$\times$$ 10$$-$$8, 3.2 $$\times$$ 10$$-$$14 and 2.7 $$\times$$ 10$$-$$15 respectively. Solubilities (in mol dm$$-$$3) of the salts at temperature T are in the order.
A
MX > MX2 > M3X
B
M3X > MX2 > MX
C
MX2 > M3X > MX
D
MX > M3X > MX2
2
WB JEE 2021
MCQ (Single Correct Answer)
+1
-0.25
Change Language
A saturated solution of BaSO4 at 25$$^\circ$$C is 4 $$\times$$ 10$$-$$5 M. The solubility of BaSO4 in 0.1 M Na2SO4 at this temperature will be
A
1.6 $$\times$$ 10$$-$$9 M
B
1.6 $$\times$$ 10$$-$$8 M
C
4 $$\times$$ 10$$-$$6 M
D
4 $$\times$$ 10$$-$$4 M
3
WB JEE 2020
MCQ (Single Correct Answer)
+2
-0.5
Change Language
A solution is saturated with SrCO3 and SrF2. The $$[CO_3^{2 - }]$$ is found to be 1.2 $$ \times $$ 10-3 M. The concentration of F- in the solution would be

Given : Ksp(SrCO3) = 7.0 $$ \times $$ 10-10,

Ksp(SrF2) = 7.9 $$ \times $$ 10-10
A
$$3.7 \times {10^{ - 6}}$$ M
B
$$3.2 \times {10^{ - 3}}$$ M
C
$$5.1 \times {10^{ - 7}}$$ M
D
$$3.7 \times {10^{ - 2}}$$ M
4
WB JEE 2019
MCQ (Single Correct Answer)
+1
-0.33
Change Language
Which of the following mixtures will have the lowest pH at 298 K?
A
10 mL 0.05 N CH3COOH + 5 mL 0.1 N NH4OH
B
5 mL 0.2 N NH4Cl + 5 mL 0.2 N NH4OH
C
5 mL 0.1 N CH3COOH + 10 mL 0.05 N CH3COONa
D
5 mL 0.1 N CH3COOH + 5 mL 0.1 N NaOH
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