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Standard X

Chemistry

Uses of Nitric Acid

Name the only...

Question

Name the only compound which is covalent but on dissolving in water it conducts electricity ?

C O_{2}

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H_{2}

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H C l

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N a C l

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Solution

The correct option is C $H C l$
$H C l$ is the only compound which is covalent but on dissolving in water it conducts electricity.
Pure $H C l$ is called hydrogen chloride and it is a gas at standard temperature and pressure. When the gas is dissolved in water, we call that solution hydrochloric acid. So hydrochloric acid is an aqueous solution of $H C l$ in water.

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Similar questions

Q. Assertion:

H C l

is a covalent compound but it conducts electricity in its aqueous state. Reason: In aqueous solution

H C l

ionises to

H^{+}

and

C l^{-}

ions which are responsible for electrical conductivity.

Q. Assertion :On dissolving

N a C l

in water we get

N a^{+} (a q .)

and

C l^{-} (a q .)

in the solution but

H C l

gives

H_{3} O^{+}

and

C l^{-}

ions. Reason:

N a C l

is ionic and

H C l

is covalent

Q. Assertion :Liquified

H C l

does not conduct electricity. Reason:

H C l

is a covalent compound.

(a) Explain why ionic compounds conduct electricity in solution whereas covalent compounds do not conduct electricity.
(b) Which of the following will conduct electricity and which not?
$M g C l_{2}, C C l_{4}, N a C l, C S_{2}, N a_{2} S$
Give reasons for your choice.

Q. (a) Explain why, ionic compounds conduct electricity in solution whereas covalent compounds do not conduct electricity.
(b) Which of the following will conduct electricity and which not?
MgCl₂, CCl₄, NaCl, CS₂, Na₂S
Give reasons for your choice.

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