What is hit and trial method?

A gaseous hydrocarbon on combustion gives $0.72 \mathrm{g}$ of water and $3.08 \mathrm{g}$ ${\mathrm{CO}}_2$. What is the empirical formula of the hydrocarbon?

Write a balanced chemical equation for the following:

Reaction of sodium hydroxide solution with iron $\left(\mathrm{III}\right)$ chloride solution.

Write a balanced chemical equation for the following:

Action of dilute hydrochloric acid on magnesium sulphite.

In balanced chemical equation

${\mathrm{aKMnO}}_4+{\mathrm{bH}}_2{\mathrm{SO}}_4\to {\mathrm{cK}}_2{\mathrm{SO}}_4+{\mathrm{dMnSO}}_4+{\mathrm{eH}}_2\mathrm{O}+\mathrm{f}\left[\mathrm{O}\right]$

The stoichiometric reaction of $516 \mathrm{g}$ of dimethyldichlorosilane with water results in a tetrameric cyclic product $\mathbf{X}$ in $75\%$ yield. The weight (in $\mathrm{g}$) of $\mathbf{X}$ obtained is ____________

[Use, molar mass $\left({\mathrm{gmol}}^{-1}\right):\mathrm{H}=1,\mathrm{C}=12,\mathrm{O}=16,\mathrm{Si}=28,\mathrm{Cl}=35.5$]

Write a balanced chemical equation for the following:

Reaction of zinc with potassium hydroxide solution.

Write a balanced chemical equation for the following:

Action of heat on aluminum hydroxide.

Write a balanced chemical equation for the following:

Action of concentrated sulphuric acid on carbon.

$1 \mathrm{g}$ silver salt of an organic dibasic acid on heating yields $0.5934 \mathrm{g} \mathrm{Ag}$. If the weight percentage of $\mathrm{C}$ in acid is $8$ times the weight percentage of hydrogen and one half the weight percentage of oxygen, then determine its molecular formula.

$\left({\mathrm{M}}_{\mathrm{Ag}}=108 \mathrm{g}\right)$

$1.44 \mathrm{g}$ of titanium $\left(\mathrm{Ti}\right)$ reacted with an excess of ${\mathrm{O}}_2$ and produced $\mathrm{x} \mathrm{g}$ of a non-stoichiometric compound ${\mathrm{Ti}}_{1.44}{\mathrm{O}}_1$. The value of $\mathrm{x}$ is:

(Atomic mass of $\mathrm{Ti}=48$)