1
JEE Main 2025 (Online) 2nd April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

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.

(C) The + and - signs in the wave function of the $2 p_x$ orbital refer to charge.

(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
(A) and (B) only
B
(B) and (D) only
C
(C) and (D) only
D
(A), (B) and (C) only
2
JEE Main 2025 (Online) 2nd April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

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

A
Radius of $4^{\text {th }}$ orbit is four times larger than that of $2^{\text {nd }}$ orbit
B
Radius of $8^{\text {th }}$ orbit is four times larger than that of $4^{\text {th }}$ orbit
C
Radius of $6^{\text {th }}$ orbit is three times larger than that of $4^{\text {th }}$ orbit
D
Radius of $3^{\text {rd }}$ orbit is nine times larger than that of $1^{\text {st }}$ orbit
3
JEE Main 2025 (Online) 29th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

For hydrogen like species, which of the following graphs provides the most appropriate representation of E vs Z plot for a constant n?

[E : Energy of the stationary state, Z : atomic number, n = principal quantum number]

A
JEE Main 2025 (Online) 29th January Evening Shift Chemistry - Structure of Atom Question 21 English Option 1
B
JEE Main 2025 (Online) 29th January Evening Shift Chemistry - Structure of Atom Question 21 English Option 2
C
JEE Main 2025 (Online) 29th January Evening Shift Chemistry - Structure of Atom Question 21 English Option 3
D
JEE Main 2025 (Online) 29th January Evening Shift Chemistry - Structure of Atom Question 21 English Option 4
4
JEE Main 2025 (Online) 29th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements :

Statement (I): It is impossible to specify simultaneously with arbitrary precision, both the linear momentum and the position of a particle.

Statement (II) : If the uncertainty in the measurement of position and uncertainty in measurement of momentum are equal for an electron, then the uncertainty in the measurement of velocity is $\geqslant \sqrt{\frac{h}{\pi}} \times \frac{1}{2 m}$.

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

A

Statement I is false but Statement II is true

B

Both Statement I and Statement II are true

C

Both Statement I and Statement II are false

D

Statement I is true but Statement II is false

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