Given below are two statements :
Statement $I$ : Boron is extremely hard indicating its high lattice energy
Statement $II$ : Boron has highest melting and boiling point compared to its other group members.
In the light of the above statements, choose the most appropriate answer from the options given below
Statement $I$ is incorrect but Statement $II$ is correct
Both Statement $I$ and Statement $II$ is correct
Statement $I$ is correct but Statement $II$ is incorrect
Both Statement $I$ and Statement $II$ is incorrect
White fumes appear around the bottle of anhydrous aluminium chloride. Give reason.
Anhydrous $AlCl_3$ is formed in
A certain salt $X,$ gives the following results.
$(i)$ Its aqueous solution is alkaline to litmus.
$(ii) $ It swells up to a glassy material $Y$ on strong heating.
$(iii)$ When conc. $H _{2} SO _{4}$ is added to a hot solution of $X,$ white crystal of an acid $Z$ separates out.
Write equations for all the above reactions and identify $X, Y$ and $Z$
Explain why the following compounds behave as Lewis acids ?
$(A)$ $BCl_3$ $(B)$ $AlCl_3$
In the metallurgy of aluminium, cryolite is mixed in the molten state because it