Excess of isobutane on reaction with ${\mathrm{Br}}_2$ in presence of light at $125°\mathrm{C}$ gives which one of the following, as the major product?

Among the following compounds $\mathrm{I}-\mathrm{IV},$ which one forms a yellow precipitate on reacting sequentially with (i) $\mathrm{NaOH}$ (ii) dil. ${\mathrm{HNO}}_3$ (iii) ${\mathrm{AgNO}}_3?$

The correct decreasing order of densities of the following compounds is :

The correct order of the following compounds showing increasing tendency towards nucleophilic substitution reaction is:

Major product P of above reaction, is:

In the given reaction $3-$Bromo$-2, 2-$dimethyl butane $\stackrel{{\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}}{⟶}\underset{\text{(Major Product)}}{\text{'}\mathrm{A}\text{'}}$ Product $\mathrm{A}$ is:

Consider the reaction sequence given below :

Which of the following statements is true: