$\left({\mathrm{SnCl}}_4\right)$ stannic chloride hydrolyses in dilute solution as per given reaction

${\mathrm{SnCl}}_4+4{\mathrm{H}}_2\mathrm{O}⟶\left[\mathrm{Sn}(\mathrm{OH}{)}_4\right]+4\mathrm{HCl}$

Hydrolysis can be repressed by adding compound $"\mathrm{A}"$.

${\mathrm{SnCl}}_4+\mathrm{A}⟶\mathrm{B}$

$\mathrm{B}$ can be

Amphoteric oxide$\left(\mathrm{X}\right)+3\mathrm{C}+{\mathrm{Cl}}_2⟶$ Poisonous gas $+$ anhydrous chloride $\left(\mathrm{Y}\right)$

Hydrated chloride $\stackrel{\mathrm{\Delta }}{⟶}\mathrm{Z}$

Element formed $\text{'}\mathrm{Y}\text{'}$ other than $\text{'}\mathrm{Cl}\text{'}$ reacts with concentrated $\mathrm{HCl}$ but leads to passivation with concentrated ${\mathrm{HNO}}_2$. Select the correct option.

Preparation of organosilicon from ${\mathrm{SiCl}}_4$ involves substitution in the first step

${\mathrm{SiCl}}_4+\mathrm{xRMgCl}⟶(\mathrm{R}{)}_{\mathrm{x}}{\mathrm{SiCl}}_{4-\mathrm{x}}+{\mathrm{xMgCl}}_2$

Values of $\text{'x'}$ to obtain chain-terminating and chain multiplication parts of chain silicone produced are respectively

How many of the following statements are correct regarding allotropes of carbon

$\left(\mathrm{a}\right)$ Graphite is not a good conductor of electricity in the perpendicular direction of layers at ordinary temperatures.

$\left(\mathrm{b}\right)$ Coke is an impure form of carbon.

$\left(\mathrm{c}\right)$ Anthracite is the purest form of carbon.

$\left(\mathrm{d}\right)$ Buckminster fullerene contains $12$ five-membered rings and $20$ six-membered rings.

$\left(\mathrm{e}\right)$ Diamond is a good conductor of heat.

$\left(\mathrm{f}\right)$ Graphite is diamagnetic in nature.

$\left(\mathrm{g}\right)$ Graphite is thermodynamically more stable than diamond.

Consider a prototypical fullerene, ${\mathrm{C}}_{60}$.

Let $\mathrm{a}=$ Number of $5$-membered rings

$\mathrm{b}=$ Number of $6$-membered rings

$\mathrm{c}=$ Number of $\pi$-bonds in ${\mathrm{C}}_{60}$

Find the value of $(3\mathrm{a}-2\mathrm{b}+\mathrm{c})$

How many of the given statements are true for potash Alum.

$\left(1\right)$ It is a white crystalline solid

$\left(2\right)$ It swells up on heating

$\left(3\right)$ It imparts a golden yellow colour to the bunsen flame

$\left(4\right)$ An aqueous solution of the above gives a white precipitate with ${\mathrm{BaCl}}_2$ solution soluble only concentrated sulphuric acid.