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JEE CHEMISTRY MCQ: d & f- BLOCK ELEMENTS

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Analyzing +4 | -1
Which of the following statements are correct, when a mixture of NaCl\mathrm{NaCl} and K2Cr2O7\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7 is gently warmed with conc. H2SO4\mathrm{H}_2 \mathrm{SO}_4 ?

I. A deep red vapour is evolved.

II. The vapour when passed into NaOH\mathrm{NaOH} solution gives a yellow solution of Na2CrO4\mathrm{Na}_2 \mathrm{CrO}_4.

III. Chlorine gas is evolved.

IV. Chromyl chloride is formed.

Choose the correct option.
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Correct option: C
I, II and IV
Option C (I, II and IV) is correct because the reaction produces chromyl chloride (CrO2Cl2CrO_2Cl_2) which gives a yellow solution of Na2CrO4Na_2CrO_4 when passed into NaOH.

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