1
WB JEE 2021
MCQ (Single Correct Answer)
+1
-0.25
Change Language
2.5 mL 0.4 M weak monoacidic base (Kb = 1 $$\times$$ 10$$-$$12 at 25$$^\circ$$C) is titrated with 2/15 M HCl in water at 25$$^\circ$$C. The concentration of H+ at equivalence point is (Kw = 1 $$\times$$ 10$$-$$14, at 25$$^\circ$$C)
A
3.7 $$\times$$ 10$$-$$13 M
B
3.2 $$\times$$ 10$$-$$7 M
C
3.2 $$\times$$ 10$$-$$2 M
D
2.7 $$\times$$ 10$$-$$2 M
2
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
3
WB JEE 2021
MCQ (Single Correct Answer)
+1
-0.25
Change Language
The reduction potential of hydrogen half-cell will be negative if
A
p(H2) = 1 atm and [H+] = 1.0 M
B
p(H2) = 1 atm and [H+] = 2.0 M
C
p(H2) = 2 atm and [H+] = 1.0 M
D
p(H2) = 2 atm and [H+] = 2.0 M
4
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
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