JEE CHEMISTRY MCQ: P-BLOCK ELEMENTS

1 Medium

1 of 1

Analyzing +4 | -1

Assertion (A):

\mathrm{NH}_3

is more polar than

\mathrm{NF}_3.

Reason (R):

\mathrm{NF}_3

cannot be hydrolysed.

View answer and explanation

Correct option: B

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

Option B is correct because both the assertion and reason are true, but the reason does not explain the assertion. NH3 is more polar than NF3 due to the direction of dipole moments, and NF3 is difficult to hydrolyze.

More Questions from P-BLOCK ELEMENTS

Practice All Chapter MCQs →

The gas used for inflating the tyres of aeroplanes is: Which of the following is correct stability order of oxides of

17^{\text {th }}

group elements is: Assertion: Ozone is a powerful oxidising agent in comparison to

{O}_2

.

Reason: Ozone is diamagnetic but

{O}_2

is paramagnetic. Which of the following is kept in water?

\mathrm{C}{\mathrm{N}^ - }

ion and

{\mathrm{N}_2}

are isoelectronic but in contrast to

\mathrm{C}{\mathrm{N}^ - },\mathrm{\;}{\mathrm{N}_2}

is chemically inert because of: Consider the following statements

(i) Reaction

2 {Fe}^{3+}+{SO}_2+2 {H}_2 {O} \rightarrow 2 {Fe}^{2+}+{SO}_4^{2-}+4 {H}^{+}

shows reducing character of sulphur dioxide

(ii)

{H}_2 {~S}_2 {O}_8

contains four

{S}={O}

, two

{S}-{OH}

and one

{O}-

{O}

bond

(iii)

{NH}_3

gas can be dried effectively by using conc.

{H}_2 {SO}_4

.

(iv) One of the major use of

{H}_2 {SO}_4

is in the manufacture of fertilizers.

Which of the following is the correct code for the statements above?