In borax, the number of $B-O-B$ links and $B-OH$ bonds present are, respectively:

Give the names of the group $13$ elements.

Inorganic graphite is:

Which of the following statements is incorrect regarding $BCl_3$?

Aluminium is a self-protecting metal,because

$A$ group $13$ element '$X$' reacts with chlorine gas to produce a compound $XCl_3$. $XCl_3$ is electron deficient and easily reacts with $NH_3$ to form $Cl_3X \leftarrow NH_3$ adduct,however,$XCl_3$ does not dimerize. $X$ is