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Byju's Answer

Standard XII

Chemistry

Ideal Gas Equation

Assertion :Th...

Question

Assertion :The heat absorbed during the isothermal expansion of an ideal gas against vacuum is zero. Reason: The volume occupied by the molecules of an ideal gas is zero.

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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Assertion is incorrect but Reason is correct

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Against vacuum, no work is done and there is no change in temperature in isothermal expansion therefore no change in internal energy. Therefore, no heat is absorbed.
The volume occupied by ideal gas is zero.
Both the statements are correct but reason is not the correct explanation of assertion.

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Similar questions

Assertion :- The heat absorbed during the isothermal expansion of an ideal gas against vacuum is zero

reason :- The volume occupied by the molecules of an ideal gas is zero.

Answer says both the statements are correct but reason doesn't explain the assertion.

i get the Assertion part (as ∆U = 0 , so q=P∆V and in vacuum P = 0) but how come the reason is true?

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.

Assertion (A) Rate constant determined from Arrhenius equation are fairly accurate for simple as well as complex molecules.

Reason (R) Reactant molecules undergo chemical change irrespective of their orientation during collision.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

Q. Assertion: The impurities such as

{SiO}_{2}

present in iron ore is removed by

{CaCO}_{3}

.

Reason:

CaO

formed by decomposition of

{CaCO}_{3}

reacts with

{SiO}_{2}

to form slag.

Assertion (A) Order of the reaction can be zero or fractional.

Reason (R) We cannot determine order from balanced chemical equation.

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