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JEE CHEMISTRY MCQ: P-BLOCK ELEMENTS

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On reaction with water,

I. fluorine oxidises water to oxygen.

II. chlorine and bromine react with water to form corresponding hydrohalic and hypohalous acids.

III. reaction of iodine with water is spontaneous.

Which of the above mentioned statements is/are correct?

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Correct option: C

I and II

Option C (I and II) is correct because fluorine oxidizes water to oxygen, and chlorine and bromine react with water to form corresponding hydrohalic and hypohalous acids. Iodine's reaction with water is non-spontaneous.

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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

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Reason: Ozone is diamagnetic but

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\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

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{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?