1
JEE Main 2023 (Online) 24th January Evening Shift
+4
-1

A photon is emitted in transition from n = 4 to n = 1 level in hydrogen atom. The corresponding wavelength for this transition is (given, h = 4 $$\times$$ 10$$^{-15}$$ eVs) :

A
99.3 nm
B
94.1 nm
C
974 nm
D
941 nm
2
JEE Main 2023 (Online) 24th January Morning Shift
+4
-1
Out of Syllabus

Consider the following radioactive decay process

$$_{84}^{218}A\buildrel \alpha \over \longrightarrow {A_1}\buildrel {{\beta ^ - }} \over \longrightarrow {A_2}\buildrel \gamma \over \longrightarrow {A_3}\buildrel \alpha \over \longrightarrow {A_4}\buildrel {{\beta ^ + }} \over \longrightarrow {A_5}\buildrel \gamma \over \longrightarrow {A_6}$$

The mass number and the atomic number of A$$_6$$ are given by :

A
210 and 84
B
210 and 80
C
211 and 80
D
210 and 82
3
JEE Main 2022 (Online) 29th July Evening Shift
+4
-1
Out of Syllabus

(A) Volume of the nucleus is directly proportional to the mass number.

(B) Volume of the nucleus is independent of mass number.

(C) Density of the nucleus is directly proportional to the mass number.

(D) Density of the nucleus is directly proportional to the cube root of the mass number.

(E) Density of the nucleus is independent of the mass number.

Choose the correct option from the following options.

A
(A) and (D) only.
B
(A) and (E) only.
C
(B) and (E) only.
D
(A) and (C) only.
4
JEE Main 2022 (Online) 29th July Morning Shift
+4
-1

Find the ratio of energies of photons produced due to transition of an electron of hydrogen atom from its (i) second permitted energy level to the first level, and (ii) the highest permitted energy level to the first permitted level.

A
3 : 4
B
4 : 3
C
1 : 4
D
4 : 1
EXAM MAP
Medical
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