`He_2` cannot exist as stable molecule. Justify this statement on the basis of bond order

The uniqueness of carbon sustain daily life'. Justify this statement on the basis of the chemistry of C.

Dipole moment is used to predict the shape of molecules. a) Justify the statement based on the shapes of CO_2 and H_2O .

"Potato is a stem and sweet potato is a root".- Justify the statement on the basis of external features only.

Bond order is a term frequently used in molecular orbital concept. How will you account for the non-existence of He_2 on the basis of bond order?

The most stable oxidation state of lanthanoid Is +3. But Yb shows on oxidation state of +2 in its compounds. Justify on the basis of electronic configuration.

Write the molecular orbital electronic configuration of N_2 and O_2 molecules. Compare the stability and magnetic behaviour of these molecules on the basis of MO theory.

NH_4Cl is a molecule containing three types of bonds. Comment on this statement and justify your answer.

'Reaction with zero order is possible but zero molecularity is not''.Justify the statement.