Question

Which of the following observations can be explained on the basis of hydrogen bonding?

(i) H – F has higher boiling point than other halogen acids.

(ii) $\mathrm { H } _ { 2 } \mathrm { O }$has highest boiling point among hydrides of group 16 elements.

(iii) $\mathrm { NH } _ { 3 }$ has lower boiling point than $\mathrm { PH } _ { 3 }$ .

• A. (i), (ii) and (iii)
• B. (i) and (iii)
• C. (ii) and (iii)
• D. (i) and (ii)

Answer 1

Answer: (D)

(i) and (ii)

Answer 2

: Statement (iii) is not true since $\mathrm { NH } _ { 3 }$ has higher boiling point than $\mathrm { PH } _ { 3 }$ due to hydrogen bonding.