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JEE CHEMISTRY MCQ: P-BLOCK ELEMENTS

1 Easy

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Analyzing +4 | -1

Statement I: The bond angle in

\mathrm{NH}_3

is more than that of

\mathrm{PH}_3

Statement II: Increasing size and decreasing electronegativity of central atom permit the bonding electrons to be drawn out further, lowering the repulsion between the bonding pairs

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Correct option: A

Statement I and statement II are correct and statement II is the correct explanation of statement I

Option A (Statement I and statement II are correct and statement II is the correct explanation of statement I) is correct because the bond angle in NH3 is greater than PH3 due to the smaller size and higher electronegativity of Nitrogen.

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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}^ - }

{\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

{S}={O}

{S}-{OH}

{O}-

{O}

{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?