When the stopper of a bottle full of hydrogen chloride gas is opened, fumes can be seen coming out. Why does this happen?

Hydrogen chloride is a noble gas.

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There is an immediate reaction between hydrogen chloride gas and water vapour in the air.

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It reacts with the bottle to release fumes.

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None of these

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Solution

The correct option is B
There is an immediate reaction between hydrogen chloride gas and water vapour in the air.

HCl is a gas at room temperature. It is present as a liquid inside the bottle. When the stopper of the bottle is opened, HCl gas escapes out and comes in contact with water vapours in the atmosphere. Thus, white fumes are formed.

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Similar questions

When the stopper of a bottle full of hydrogen chloride liquid is opened, fumes can be seen coming out. Why does this happen?

Explain why :

(a) anhydrous HCl is a poor conductor while aqueous HCl is an excellent conductor.
(b) when the stopper of a bottle full of hydrogen chloride gas is opened there are fumes in the air.
(c) a solution of hydrogen chloride in water turns blue litmus red and conducts electricity, while a solution of the same gas in toluene :
(i) has no effect on litmus, and
(ii) does not conduct electricity.
(d) thick white fumes are formed when a glass rod dipped in $N H_{4} O H$ is brought near the mouth of a bottle full of HCl gas.
(e) dry hydrogen chloride gas does not affect a dry strip of blue litmus paper but it turns red in the presence of a drop of water.

(f) hydrogen chloride gas is not collected over water.

Q. Explain why? [5 MARKS]
(a) Anhydrous HCl is a poor conductor while aq. HCl is an excellent conductor of electricity.
(b) Only a very dilute solution of hydrogen chloride in water can be concentrated by boiling the solution while a very concentrated solution would become less concentrated when boiled.
(c) When the stopper of a bottle full of hydrogen chloride gas is opened, there are fumes in the air.

Hydrogen chloride gas fumes in moist air but hydrogen sulphide gas does not.

Q. Explain the following: [5 MARKS]
(a) Thick white fumes are formed when a glass rod dipped in

N H_{4} O H

is brought near the mouth of a bottle full of HCl gas.
(b) Dry Hydrogen chloride gas does not affect a dry strip of blue litmus but turns red in the presence of a drop of water.
(c) Hydrogen Chloride gas is not collected over water.

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