JEE CHEMISTRY MCQ: P-BLOCK ELEMENTS

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Analyzing +4 | -1

Assertion: Pure

N_2

is obtained from

Ba\left(N_3\right)_2

but not from

\left(NH_4\right)_2 Cr_2 O_7

Reason: On decomposition

\left(NH_4\right)_2 Cr_2 O_7

gives

O_2

gas.

View answer and explanation

Correct option: C

If Assertion is correct but Reason is incorrect.

The correct answer is C because the assertion is correct (pure N2 is obtained from Ba(N3)2) but the reason is incorrect (decomposition of (NH4)2Cr2O7 does not give O2 gas).

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?