1
JEE Main 2021 (Online) 1st September Evening Shift
Numerical
+4
-1
Change Language
The molar solubility of Zn(OH)2 in 0.1 M NaOH solution is x $$\times$$ 10$$-$$18 M. The value of x is _________ (Nearest integer)

(Given : The solubility product of Zn(OH)2 is 2 $$\times$$ 10$$-$$20)
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2
JEE Main 2021 (Online) 31st August Evening Shift
Numerical
+4
-1
Change Language
The pH of a solution obtained by mixing 50 mL of 1 M HCl and 30 mL of 1 M NaOH is x $$\times$$ 10$$-$$4. The value of x is ____________. (Nearest integer) [log 2.5 = 0.3979]
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3
JEE Main 2021 (Online) 31st August Morning Shift
Numerical
+4
-1
Change Language
A3B2 is a sparingly soluble salt of molar mass M (g mol$$-$$1) and solubility x g L$$-$$1. The solubility product satisfies $${K_{sp}} = a{\left( {{x \over M}} \right)^5}$$. The value of a is _____________. (Integer answer)
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4
JEE Main 2021 (Online) 18th March Evening Shift
Numerical
+4
-1
The solubility of CdSO4 in water is 8.0 $$\times$$ 10$$-$$4 mol L$$-$$1. Its solubility in 0.01 M H2SO4 solution is __________ $$\times$$ 10$$-$$6 mol L$$-$$1. (Round off to the Nearest Integer). (Assume that solubility is much less than 0.01 M)
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