1
JEE Main 2024 (Online) 1st February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
From the statements given below :

(A) The angular momentum of an electron in $n^{\text {th }}$ orbit is an integral multiple of $\hbar$.

(B) Nuclear forces do not obey inverse square law.

(C) Nuclear forces are spin dependent.

(D) Nuclear forces are central and charge independent.

(E) Stability of nucleus is inversely proportional to the value of packing fraction.

Choose the correct answer from the options given below :
A
(B), (C), (D), (E) only
B
(A), (C), (D), (E) only
C
(A), (B), (C), (E) only
D
(A), (B), (C), (D) only
2
JEE Main 2024 (Online) 1st February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
The minimum energy required by a hydrogen atom in ground state to emit radiation in Balmer series is nearly :
A
$13.6 \mathrm{eV}$
B
$1.5 \mathrm{eV}$
C
$12.1 \mathrm{eV}$
D
$1.9 \mathrm{eV}$
3
JEE Main 2024 (Online) 31st January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The mass number of nucleus having radius equal to half of the radius of nucleus with mass number 192 is :

A
32
B
24
C
20
D
40
4
JEE Main 2024 (Online) 31st January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

If the wavelength of the first member of Lyman series of hydrogen is $$\lambda$$. The wavelength of the second member will be

A
$$\frac{27}{5} \lambda$$
B
$$\frac{5}{27} \lambda$$
C
$$\frac{27}{32} \lambda$$
D
$$\frac{32}{27} \lambda$$
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