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Q.

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The correct statement about 'gas' is:

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a

It is recognised by its turning litmus paper blue.

b

It is recognised by increase in intensity of white fumes when a glass rod moistened with ammonia solution is held near the mouth of the test tube.

c

It is recognized by its pungent order and production of white fumes, on blowing across the mouth of the test tube.

d

'X' gas is Cl2 with greenish yellow fumes.

answer is A, B.

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Detailed Solution

When sulfuric acid is  treat with chloride salts, HCl gas is created, which results in the production of a colourless gas. Iodine gas is created during the reaction, which results in the production of violet vapours.

The option A and B are correct regarding this gas.

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