It has been observed that gaseous hydrogen chloride is a very poor conductor of electricity but a solution of hydrogen chloride gas in water is a good conductor of electricity. This is due to the fact that:

Water is good conductor of electricity

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Hydrogen chloride gas in water solution ionizes

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A gas is non-conductor but a liquid conducts electricity

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Gas does not obey Ohm's law whereas solution does

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Solution

The correct option is B Hydrogen chloride gas in water solution ionizes
In its gaseous form, HCl cannot dissociate to form hydrogen and chloride ions, whereas, in its solution, it renders hydronium ions and chloride ions. These ions act as charge carriers, that are responsible for the conduction of electricity.

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Q. It has been observed that gaseous hydrogen chloride is a very poor conductor of electricity but a solution of hydrogen chloride gas in water is a good conductor of electricity. This is due to the fact that

Q. Explain the following:
A solution of cane sugar does not conduct electricity, but a solution of solution of sodium chloride is a good conductor,

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. Which of the following indicates that the bonding in hydrogen chloride is covalent?

(i) An aqueous solution of hydrogen chloride form hydrogen with metals.
(ii) Hydrogen chloride is a gas.
(iii) Hydrogen chloride is not acidic in the absence of water.
(iv) Dry hydrogen chloride is a non-conductor of electricity.

Q. Give reasons for the following.
(a) Operating electrical appliances with wet hands is very dangerous.
(b) Sodium chloride solution is a good conductor of electricity.
(c) Pure water is a poor conductor of electricity.

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