The two types of bonds present in $B_2H_6$ are covalent and

The electronic configuration of three elements $A$,$B$ and $C$ are given below. Stable form of $C$ may be represented by the formula
$A : 1s^2, 2s^2, 2p^6$
$B : 1s^2, 2s^2, 2p^6, 3s^2, 3p^3$
$C : 1s^2, 2s^2, 2p^6, 3s^2, 3p^5$

Which of the following molecules does not obey the octet rule?

What is a multiple bond? Give the difference between a single bond,a double bond,and a triple bond.

Which one of the following compounds is hypervalent?

Which of the following molecules acts as a Lewis acid?