Question

From the following given statements
i) O ---- H hydrogen bond length is more than covalent "O-H" bond length
ii) The ionic bond strength of $CsF$ is more than that of $NaF$
iii) The number of electrons present in all shells of sodium atom is 10.
The correct combination is:

• A. only (i) is correct
• B. only (i) and (ii) are correct
• C. only (ii) and (iii) are correct
• D. all are incorrect

Answer 1

The correct option is B only (i) and (ii) are correct

$\left(i\right)$ Hydrogen bond length of $O-H$ is more than covalent bond length because strength of covalent bond is more than that of hydrogen bond.

$\left(ii\right)$ionic bond is most effective between the most electropositive atom and most electronegative atom. So $CsF$ has more strength than $NaF$

$\left(iii\right)$ in $Na$ the total electrons are 11 but in $Na$ ion it has 10 electrons.