JEE CHEMISTRY MCQ: P-BLOCK ELEMENTS

1 Easy

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Analyzing +4 | -1

Assertion (A) : Among nitrogen halides

\mathrm{NX}_3

, the dipole moment is highest for

\mathrm{NI}_3

and lowest for

\mathrm{NF}_3

.

Reason (R): Nitrogen halides

N X_3

, have trigonal pyramidal structure.

View answer and explanation

Correct option: B

A

and

R

are true and

R

is not explaining

A

Option B is correct. Assertion and Reason are both true, but the Reason does not explain the Assertion. The dipole moment depends on the vector sum of bond moments and lone pair moments.

More Questions from P-BLOCK ELEMENTS

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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?