JEE Main 2022 (Online) 28th June Morning Shift | Atoms and Nuclei Question 130 | Physics

Statement I : In hydrogen atom, the frequency of radiation emitted when an electron jumps from lower energy orbit (E₁) to higher energy orbit (E₂), is given as hf = E₁ $$-$$ E₂

Statement II : The jumping of electron from higher energy orbit (E₂) to lower energy orbit (E₁) is associated with frequency of radiation given as f = (E₂ $$-$$ E₁)/h

This condition is Bohr's frequency condition.

In the light of the above statements, choose the correct answer from the options given below :

Both Statement I and Statement II are true.

Both Statement I and Statement II are false.

Statement I is correct but Statement II is false.

Statement I is incorrect but Statement II is true.

JEE Main 2022 (Online) 27th June Morning Shift

MCQ (Single Correct Answer)

-1

A hydrogen atom in its ground state absorbs 10.2 eV of energy. The angular momentum of electron of the hydrogen atom will increase by the value of :

(Given, Planck's constant = 6.6 $$\times$$ 10^$$-$$34 Js).

2.10 $$\times$$ 10^$$-$$34 Js

1.05 $$\times$$ 10^$$-$$34 Js

3.15 $$\times$$ 10^$$-$$34 Js

4.2 $$\times$$ 10^$$-$$34 Js

JEE Main 2022 (Online) 26th June Evening Shift

MCQ (Single Correct Answer)

-1

Out of Syllabus

A radioactive nucleus can decay by two different processes. Half-life for the first process is 3.0 hours while it is 4.5 hours for the second process. The effective half-life of the nucleus will be:

3.75 hours

0.56 hours

0.26 hours

1.80 hours

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