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Question: Answered & Verified by Expert
Concentrated hydrochloric acid when kept in open air sometimes produces a cloud of white fumes. The explanation for it is that
Chemistryp Block Elements (Group 15, 16, 17 & 18)JEE MainJEE Main 2003
Options:
  • A
    oxygen in air reacts with the emitted HCI gas to form a cloud of chlorine gas
  • B
    strong affinity of HCI gas for miosture in air results in forming of droplets of liquid solution which appears like a cloudy smoke.
  • C
    due to strong affinity for water, concentrated hydrochloric acid pulls moisture of air towards it self. This moisture forms droplets of water and hence the cloud.
  • D
    concentrated hydrochloric acid emits strongly smelling HCI gas all the time.
Solution:
1929 Upvotes Verified Answer
The correct answer is:
oxygen in air reacts with the emitted HCI gas to form a cloud of chlorine gas
$4 \mathrm{HCI}+\mathrm{O}_2 \rightarrow 2 \mathrm{Cl}_2+2 \mathrm{H}_2 \mathrm{O}$
Cloud of white fumes

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