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Kanika takes a burning substance and co...

Kanika takes a burning substance and collects the evolved vapours in a test tube, making sure that they do not escape. A small amount of water is added to the test tube. To the solution obtained, a few drops of blue litmus solution are added. The litmus solution turns red. Which of the following could be the burning substance?

A

Mg

B

S

C

Na

D

Fe

Text Solution

Verified by Experts

The correct Answer is:
B
As the solution turns blue litmus red so, it is an acidic solution. On burning metals and non-metals, their oxides are formed. Non-metals form acidic oxides, Therefore, the substance which Kanika burned must be a non-metal (here Mg, Na and Fe are metals while S is a non-metal).
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