1
JEE Main 2022 (Online) 27th July Morning Shift
Numerical
+4
-1
Change Language

At $$310 \mathrm{~K}$$, the solubility of $$\mathrm{CaF}_{2}$$ in water is $$2.34 \times 10^{-3} \mathrm{~g} / 100 \mathrm{~mL}$$. The solubility product of $$\mathrm{CaF}_{2}$$ is ____________ $$\times 10^{-8}(\mathrm{~mol} / \mathrm{L})^{3}$$. (Give molar mass : $$\mathrm{CaF}_{2}=78 \mathrm{~g} \mathrm{~mol}^{-1}$$)

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2
JEE Main 2022 (Online) 27th July Morning Shift
Numerical
+4
-1
Change Language

In the titration of $$\mathrm{KMnO}_{4}$$ and oxalic acid in acidic medium, the change in oxidation number of carbon at the end point is ___________.

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3
JEE Main 2022 (Online) 28th June Morning Shift
Numerical
+4
-1
Change Language

The solubility product of a sparingly soluble salt A2X3 is 1.1 $$\times$$ 10$$-$$23. If specific conductance of the solution is 3 $$\times$$ 10$$-$$5 S m$$-$$1, the limiting molar conductivity of the solution is $$x \,\times$$ 10$$-$$3 S m2 mol$$-$$1. The value of x is ___________.

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4
JEE Main 2022 (Online) 27th June Evening Shift
Numerical
+4
-1
Change Language

pH value of 0.001 M NaOH solution is ____________.

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