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Rutherford's Model

Assertion :In...

Question

Assertion :In a hydrogen atom, energy of emitted photon corresponding to transition from $n = 2$ to $n = 1$ is much greater as compared to transition from $n = \infty$ to $n = 2$ . Reason: Wavelength of photon is directly proportional to the energy of emitted photon.

A

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

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B

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

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C

Assertion is correct but Reason is incorrect

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D

Both Assertion and Reason are incorrect

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Solution

The correct option is C Assertion is correct but Reason is incorrect
Lyman series: frequency of emitted photon is in the ultraviolet region.
Balmer series: Frequency of emitted photon is in the visible region.
Now, frequency of energy of ultraviolet photon is much greater than frequency of visible region. So, assertion is true but reason is false.

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Similar questions

Q. Assertion :In a hydrogen atom, energy of emitted photon corresponding to transition from

n = 2

n = 1

is much greater as compared to transition from

n = \infty

n = 2

Reason: Wavelength of photon is directly proportional to the energy of emitted photon

ASSERTION: n-Pentane and n-Hexane belong to a homologous series.

REASON: n-Pentane and n-Hexane belong to the same class of hydrocarbons and they differ by a - $C H_{2}$ - group.

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}

Q. Assertion: Lattice energy of

C a O

is higher than that of

N a C l

.

Reason: The lattice energy of an ionic compund is directly proportional to the product of the charges of ions.

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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