JEE Main 2025 (Online) 4th April Morning Shift | Structure of Atom Question 32 | Chemistry

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JEE Main 2025 (Online) 4th April Morning Shift

MCQ (Single Correct Answer)

-1

Which one of the following about an electron occupying the 1 s orbital in a hydrogen atom is incorrect?

(Bohr's radius is represented by $\mathrm{a}_0$)

The probability density of finding the electron is maximum at the nucleus

The total energy of the electron is maximum when it is at a distance $a_0$ from the nucleus

The electron can be found at a distance $2 a_0$ from the nucleus

The 1 s orbital is spherically symmetrical

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 33 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

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