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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

Verified by Experts

The correct Answer is:
B
Sulphur is the non-metal which burns with a blue-coloured flame. `SO_2` turns orange-coloured `K_2Cr_2O_7` to green due to the formation of `Cr_2(SO_4)_3`
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