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Question

An alkaline gas A gives dense white fumes with hydrogen chloride. What is A?


A

NH3

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B

Cl2

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C

SO2

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D

H2S

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Solution

The correct option is A

NH3


Ammonia has a sharp characteristic odour. It turns moist red litmus blue,moist turmeric paper brown and phenolphthalein solution pink.

It gives dense white fumes of ammonium chloride, with conc. hydrochloric acid.

NH3+HClNH4Cl


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