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Question

From the following information
X+H2SO4Y (a colourless and irritating gas)
Y+K2Cr2O7+H2SO4 green coloured solution. Identify the pair X and Y.

A
Cl,HCl
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B
SO23,SO2
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C
S2,H2S
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D
CO23,CO2
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Solution

The correct option is A SO23,SO2
From the following information:-
Sulphur trioxide radical react with sulphuric acid to produce disulphuric acid. Sulphuric acid anhydrous.
Sulphur dioxide reaction with dichromate and sulphuric acid to produce potassium sulphate, chromium(III) sulphate and water.

1137171_1198905_ans_d1d0a8df61cf4c458caeebd08ca50549.png

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