Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • Please,please help me Concentrated hydrochloric acid when kept in open air sometimes produces a cloud of white fumes. The explanation for it is that

Concentrated hydrochloric acid when kept in open air sometimes produces a cloud of white fumes. The explanation for it is that

  • Option 1)

    concentrated hydrochloric acid emits strongly smelling HCl  gas all the time

  • Option 2)

    oxygen in air reacts with the emitted HCl gas to form a cloud of chlorine gas

  • Option 3)

    strong affinity of HCl gas for moisture in air results in forming of droplets of liquid solution which appears like a cloudy smoke

  • Option 4)

    due to strong affinity for water, concentrated hydrochloric acid pulls moisture of air towards itself. This moisture forms droplets of water and hence the cloud.

 

Answers (1)

As we learnt in 

Deacon process -

2HCl+\frac{1}{2}O_{2} \xrightarrow[]{CuCl_{2}}Cl_{2}+H_{2}O

- wherein

CuCl2 used as catalyst 

 

 

 

Concentrated HCl produces vapours of HCl. As HCl has strong affinity for moisture, it yields the formation of droplets of liquid solution which appear like a cloudy smoke.


Option 1)

concentrated hydrochloric acid emits strongly smelling HCl  gas all the time

This option is incorrect.

Option 2)

oxygen in air reacts with the emitted HCl gas to form a cloud of chlorine gas

This option is incorrect.

Option 3)

strong affinity of HCl gas for moisture in air results in forming of droplets of liquid solution which appears like a cloudy smoke

This option is correct.

Option 4)

due to strong affinity for water, concentrated hydrochloric acid pulls moisture of air towards itself. This moisture forms droplets of water and hence the cloud.

This option is incorrect.

Posted by

Sabhrant Ambastha

View full answer

JEE Main high-scoring chapters and topics

Study 40% syllabus and score up to 100% marks in JEE

Similar Questions

Trending Articles/News

anam-khan

JEE Main 2025: NIT Andhra Pradesh cut-offs drop for CSE, ECE, other BTech programmes this year; closing rank
anam-khan

JEE Main 2025 Live: Exam city slip soon at jeemain.nta.nic.in; admit card date, cut-off updates
anam-khan

BTech Admissions 2025: GUJCET registration ends on December 31; JEE Main, AEEE, WBJEE, SRMJEEE exam date

Latest Question