JEE Main 2025 (Online) 3rd April Evening Shift | Structure of Atom Question 7 | Chemistry

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JEE Main 2025 (Online) 3rd April Evening Shift

MCQ (Single Correct Answer)

-1

For electrons in ' 2 s ' and ' 2 p ' orbitals, the orbital angular momentum values, respectively are :

0 and $\sqrt{6} \frac{h}{2 \pi}$

0 and $\sqrt{2} \frac{h}{2 \pi}$

$\sqrt{2} \frac{h}{2 \pi}$ and 0

$\frac{h}{2 \pi}$ and $\sqrt{2} \frac{h}{2 \pi}$

JEE Main 2025 (Online) 3rd April Morning Shift

MCQ (Single Correct Answer)

-1

Which of the following postulate of Bohr's model of hydrogen atom is not in agreement with quantum mechanical model of an atom?

The electron in a H atom's stationary state moves in a circle around the nucleus.

An atom can take only certain distinct energies $\mathrm{E}_1, \mathrm{E}_2, \mathrm{E}_3$, etc. These allowed states of constant energy are called the stationary states of atom.

An atom in a stationary state does not emit electromagnetic radiation as long as it stays in the same state.

When an electron makes a transition from a higher energy stationary state to a lower energy stationary state, then it emits a photon of light.

JEE Main 2025 (Online) 2nd April Evening Shift

MCQ (Single Correct Answer)

-1

Which of the following statements are true?

(A) The subsidiary quantum number $l$ describes the shape of the orbital occupied by the electron.

(B) JEE Main 2025 (Online) 2nd April Evening Shift Chemistry - Structure of Atom Question 7 English is the boundary surface diagram of the $2 \mathrm{p}_x$ orbital.

(D) The wave function of $2 \mathrm{p}_x$ orbital is zero everywhere in the $x y$ plane.

Choose the correct answer from the options given below :

(A) and (B) only

(B) and (D) only

(A), (B) and (C) only

JEE Main 2025 (Online) 2nd April Morning Shift

MCQ (Single Correct Answer)

-1

According to Bohr's model of hydrogen atom, which of the following statement is incorrect?

Radius of $4^{\text {th }}$ orbit is four times larger than that of $2^{\text {nd }}$ orbit

Radius of $8^{\text {th }}$ orbit is four times larger than that of $4^{\text {th }}$ orbit

Radius of $6^{\text {th }}$ orbit is three times larger than that of $4^{\text {th }}$ orbit

Radius of $3^{\text {rd }}$ orbit is nine times larger than that of $1^{\text {st }}$ orbit

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