At absolute zero temperature Si acts as ...

At absolute zero temperature Si acts as ……..

non metal

metal

insulator

none of these

Text Solution

Verified by Experts

The correct Answer is:

insulator
At absolute zero temperature, valence band in the crystal structure is completely filled and there is no free electron in conduction ban means it is empty in the context of electric charge hence at this temperature it acts as a insulator.

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Statements and reasons are given. Choose the correct option form the following. (Q.43, 44, 45) Statement : Chlorine gas become solid at absolute zero temperature but its entropy will be zero. Reason : Chlorine has strong small and its difficult to correct it into solid.

Statement and reason both are correct and correct explanation of statement is given by reason.

Statement and reason both are correct but correct explanation of statement is not given by reason.

Statement is correct but reason is wrong.

Statement and reason both are wrong.

The wavelength of de-Broglie wave associated with a neutron of mass m at absolute temperature T is given by ……….. (here K is the Boltzman constant)

`(h)/(sqrt(2mkT))`

`(h)/(sqrt(mkT))`

`(k)/(sqrt(3mkT))`

`(h)/(2sqrt(mkT))`

Two substances A and B have relation T_(A)=4T_(B) for their absolute zero temperature. The difference in their wavelength is 3.0mum when maximum radiation energy emit from them. Wavelength of B for maximum radiation energy is . . . . . .. mum .

`2.5`

`4.0`

`4.5`