The $\mathrm{pH}$ at which $\mathrm{Mg}(\mathrm{OH})_2\left[\mathrm{~K}_{\mathrm{sp}}=1 \times 10^{-11}\right]$ begins to precipitate from a solution containing $0.10 \mathrm{~M} \mathrm{~Mg}^{2+}$ ions is __________.

At $310 \mathrm{~K}$, the solubility of $\mathrm{CaF}_{2}$ in water is . The solubility product of is ____________ . (Give molar mass : )

A first row transition metal with highest enthalpy of atomisation, upon reaction with oxygen at high temperature forms oxides of formula $\mathrm{M}_2 \mathrm{O}_{\mathrm{n}}$ (where ). The 'spin-only' magnetic moment value of the amphoteric oxide from the above oxides is _________ (near integer)

Number of alkanes obtained on electrolysis of a mixture of $\mathrm{CH}_3 \mathrm{COONa}$ and $\mathrm{C}_2 \mathrm{H}_5 \mathrm{COONa}$ is ________.

For the given reactions

Sn²⁺ + 2e^$-$ $\to$ Sn

Sn⁴⁺ + 4e^$-$ $\to$ Sn

A solution of Fe₂(SO₄)₃ is electrolyzed for 'x' min with a current of 1.5 A to deposit 0.3482 g of Fe. The value of x is ___________. [nearest integer]

Given : 1 F = 96500 C mol^$-$1

Atomic mass of Fe = 56 g mol^$-$1

On reaction with stronger oxidizing agent like $\mathrm{KIO}_{4}$, hydrogen peroxide oxidizes with the evolution of $\mathrm{O}_{2}$. The oxidation number of in changes to __________.

In a cell, the following reactions take place

$\begin{aligned} &Fe^{2+} \to Fe^{3+} + e^- & E^\circ_{Fe^{3+}/Fe^{2+}} = 0.77 \text{ V} \\ &2I^- \to I_2 + 2e^- & E^\circ_{I_2/I^-} = 0.54 \text{ V} \end{aligned}$

Among $\mathrm{CrO}, \mathrm{Cr}_2 \mathrm{O}_3$ and , the sum of spin-only magnetic moment values of basic and amphoteric oxides is _________ (nearest integer).