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An element X burns with a brilliant blue...

An element X burns with a brilliant blue flame in the presence of oxygen to form Y.Y turns acidified potassium dichromate paper green. Identify X and Y.

A

Nitrogen nitrogen dioxide

B

Sulphur, sulphur dioxide

C

Phosphorus, phosphorus pentoxide

D

Sodium, sodium oxide

Text Solution

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The correct Answer is:
B
Sulphur is the non-metal which burns with a blue coloured flams. `SO_(2)` turns orange coloured `K_(2)Ce_(2)O_(7)` green due to the formation of `Cr(SO_(4))_(3)`.
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