Assertion :Electrical conductivity of semiconductors increases with increasing temperature. Reason: With an increase in temperature, the number of electrons from the valence bond can jump to the conduction band in semiconductors.

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Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
The electrical conductivity of solids is due to the motion of electrons and holes or ions.

Conduction of ionic solids is due to the absence of vacancies and other defects. Thus, the conductivity of semiconductors, as well as insulators, is mainly because of impurities and defects present in them. Electrons and holes produced by the ionization of defects contribute to conduction in these solids.

The electrical conductivity of semiconductors increases with increasing temperature because, with increase in temperature, number of electrons from the valence bond can jump to the conduction band in semiconductors.

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Similar questions

In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices.

(a) Assertion and Reason both are correct statements an Reason is correct explanation for Assertion.

(b) Assertion and Reason both are correct satements but Reason is not correct explanation for Assertion.

(d) Assertion is wrong statement but Reason is correct statement.

Assertion (A) Semiconductors are solids with conductivities in the intermediate range from $10^{-} 6 - 10^{4} o h m^{-} 1 m^{-} 1$ .

Reason (R) Intermediate conductivity in semiconductor is due to partially filled valence band.

Q. Assertion: Electrical conductivity of semiconductors decreases with increasing temperature.
Reason: With increase in temperature, large number of electrons from the valence band can jump to the conduction band.

Q. For the following Assertion and Reason, the correct option is:
Assertion: The

p H

of water increases with increase in temperature.

Reason: The dissociation of water into

H^{+}

and

O H^{-}

an exothermic reaction.

Q. Assertion : In the bonding molecular orbital (MO) of

H_{2}

, the electron density is increased between the nuclei.
Reason : The bonding MO is

ψ_{A} + ψ_{B}

, which shows destructive interference of the combining electron waves.

Q. Assertion: The compressibility factor for

H_{2}

and

H e

(1 + \frac{P b}{R T})

Reason: The compressibility factor for

H_{2}

and

H e

can be derived from Van der Waal's equation.

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Assertion :Electrical conductivity of semiconductors increases with increasing temperature. Reason: With an increase in temperature, the number of electrons from the valence bond can jump to the conduction band in semiconductors.Choose the correct option.

Assertion :Electrical conductivity of semiconductors increases with increasing temperature. Reason: With an increase in temperature, the number of electrons from the valence bond can jump to the conduction band in semiconductors.

Choose the correct option.