Physics

Problem

Which statement is correct? a. m.p. of

\text{H}_2\text{O}

\text{NH}_3

are maximum in their respective group due to intermolecular H-bonding b. b.p. of

\text{CH}_4

out of

\text{CH}_4

\text{SiH}_4

\text{GeH}_4

and

\text{SnH}_4

is least due to weak intermolecular force of attraction c. formic acid forms dimer by H-bonding d. all are correct