JEE Main 2024 (Online) 29th January Morning Shift | Structure of Atom Question 22 | Chemistry

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JEE Main 2024 (Online) 29th January Morning Shift

MCQ (Single Correct Answer)

-1

The correct set of four quantum numbers for the valence electron of rubidium atom $$(\mathrm{Z}=37)$$ is :

$$5,1,1,+\frac{1}{2}$$

$$5,0,0,+\frac{1}{2}$$

$$5,0,1,+\frac{1}{2}$$

$$5,1,0,+\frac{1}{2}$$

JEE Main 2023 (Online) 15th April Morning Shift

MCQ (Single Correct Answer)

-1

Given below are two statements:

Statement I : According to Bohr's model of hydrogen atom, the angular momentum of an electron in a given stationary state is quantised.

Statement II : The concept of electron in Bohr's orbit, violates the Heisenberg uncertainty principle.

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

Both Statement I and Statement II are incorrect

Statement I is correct but Statement II is incorrect

Both Statement I and Statement II are correct

Statement I is incorrect but Statement II is correct

JEE Main 2023 (Online) 13th April Morning Shift

MCQ (Single Correct Answer)

-1

The energy of an electron in the first Bohr orbit of hydrogen atom is $$-2.18 \times 10^{-18} \mathrm{~J}$$. Its energy in the third Bohr orbit is ____________.

One third of this value

Three times of this value

$$\frac{1}{9}$$ th of this value

$$\frac{1}{27}$$ of this value

JEE Main 2023 (Online) 11th April Morning Shift

MCQ (Single Correct Answer)

-1

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R :

Assertion A : In the photoelectric effect, the electrons are ejected from the metal surface as soon as the beam of light of frequency greater than threshold frequency strikes the surface.

Reason R : When the photon of any energy strikes an electron in the atom, transfer of energy from the photon to the electron takes place.

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

Both A and R are correct and R is the correct explanation of A

A is not correct but R is correct

A is correct but R is not correct

Both A and R are correct but R is NOT the correct explanation of A

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