Consider the following -

Statement I : The order of electronegativity of $\mathrm{B}, \mathrm{Al}$, In Tl is $$ \mathrm{B}>\mathrm{Tl}>\mathrm{Al}>\mathrm{In} $$

Statement II : Boric acid is a weak protonic acid.

The correct answer is

Which of the following does not exist?

Gas $X$ is obtained in Deacon's process. X on reacting with iodine and water gives

Identify the correct sets

(i) Boron fibres - bullet proof vest

(ii) Metal borides - protective shields

(iii) Borax - glass wool

Correct option is