The coordination number of $N{a}^{+}Na^+$ and $C{l}^{-}Cl^-$ in NaCl is ………….

Generally the chemical bond formed between IA and VII A group elements ……………

The valency of aluminium in $A{l}_2{O}_{3}Al\_2O\_3$ with respect to oxygen is ……....

The formula of the compound formed by $A^{3+}A^\{3+\}$ and $B^{2-}B^\{2-\}$ is ……………..

The ratio of coordination number of $N{a}^{+}Na^+$ and $C{l}^{-}Cl^-$ in face-centred cubic lattice crystal of NaCl is …………

The coordination number of $N{a}^{+}Na^+$ in NaCl is ……………….

Which of the following element lose three electrons to get octet in its outer shell?

The formula of metal (M) chloride is $MC{l}_{3}MCl\_3$. Formula of its sulphate is

Which of the following is a covalent compound?

The number of covalent bonds in methane is …………….