When N₂, the N-N bond distance _____ and when O₂ goes to $$O_2^+$$ the O-O bond distance ___.

The number and type of bonds between two carbon atoms in CaC₂ are:

Among the following species, identity the isostructural pairs NF₃, $$NO_3^-$$, BF₃, H₃O⁺ , HN₃

A mixture of ideal gas is cooled upto liquid helium temperature (4.22K) to form an ideal solution