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Standard XII

Chemistry

Quantum Numbers

Assertion :In...

Question

Assertion :In photoelectric effect, at stopping potential emission of photo-electrons is stopped. Reason: Increases in intensity of given light increases the kinetic energy of photo-electron.

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 C Assertion is correct but Reason is incorrect
In photoelectric effect , at stopping potential emission of photo-electrons is stopped is correct. and
Increases in intensity of given light increases the kinetic enegy of photo- electron is wrong.
$∴$ Option $C$ is correct.

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Similar questions

Q. Assertion : Two electrons of helium atom are placed in only one shell but three electrons of lithium need two shells.
Reason: A shell can have maximum

{2n}^{2}

electrons.

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: Average kinetic energy in one oscillation during

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\frac{1}{4} m ω^{2} A^{2}

.
Reason: Maximum kinetic energy is

\frac{1}{2} m ω^{2} A^{2}

Q. Assertion: The compressibility factor for

H_{2}

and

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

Reason: The compressibility factor for

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and

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can be derived from Van der Waal's equation.

Assertion (A) All collision of reactant molecules lead to product formation.

Reason (R) Only those collisions in which molecules have correct orientation and sufficient kinetic energy lead to compound formation.

(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.

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Assertion :In photoelectric effect, at stopping potential emission of photo-electrons is stopped. Reason: Increases in intensity of given light increases the kinetic energy of photo-electron.

The correct option is C Assertion is correct but Reason is incorrectIn photoelectric effect , at stopping potential emission of photo-electrons is stopped is correct. and Increases in intensity of given light increases the kinetic enegy of photo- electron is wrong.∴ Option C is correct.

The correct option is C Assertion is correct but Reason is incorrect
In photoelectric effect , at stopping potential emission of photo-electrons is stopped is correct. and
Increases in intensity of given light increases the kinetic enegy of photo- electron is wrong.
$∴$ Option $C$ is correct.