1
JEE Advanced 2016 Paper 1 Offline
MCQ (More than One Correct Answer)
+4
-2
Highly excited states for hydrogen-like atoms (also called Rydberg states) with nuclear charge Ze are defined by their principle quantum number n, where n >> 1. Which of the following statement(s) is(are) true?
A
Relative change in the radii of two consecutive orbitals does not depend on Z.
B
Relative change in the radii of two consecutive orbitals varies as 1/n
C
Relative change in the energy of two consecutive orbitals varies as 1/n3
D
Relative change in the angular momenta of two consecutive orbitals varies as 1/n
2
JEE Advanced 2015 Paper 2 Offline
MCQ (More than One Correct Answer)
+4
-2
A fission reaction is given by $$_{92}^{236}U \to _{54}^{140}Xe + _{38}^{94}Sr + x + y$$, where x and y are two particles. Considering $$_{92}^{236}U$$ to be at rest, the kinetic energies of the products are denoted by $${K_{Xe}},{K_{Sr}},{K_x}(2MeV)$$ $$ \text { and } \mathrm{K}_{\mathrm{y}}(2 \mathrm{MeV}) $$, respectively. Let the binding energies per nucleon of $$_{92}^{236}U$$, $$_{54}^{140}Xe$$ and $$_{38}^{94}Sr$$ be 7.5 MeV, 8.5 MeV and 8.5 MeV, respectively. Considering different conservation laws, the correct options is/are
A
x = n, y = n, Ksr = 129 MeV, KXe = 86 MeV
B
x = p, y = e$$-$$, Ksr = 129 MeV, KXe = 86 MeV
C
x = p, y = n, Ksr = 129 MeV, KXe = 86 MeV
D
x = n, y = n, Ksr = 86 MeV, KXe = 129 MeV
3
JEE Advanced 2013 Paper 2 Offline
MCQ (More than One Correct Answer)
+4
-2

The radius of the orbit of an electron in a hydrogen-like atom is 4.5a0, where a0 is the Bohr radius. Its orbital angular momentum is $${{3h} \over {2\pi }}$$. It is given that h is Planck constant and R is Rydberg constant. The possible wavelength(s), when the atom de-excites, is(are)

A
$${9 \over {32R}}$$
B
$${9 \over {16R}}$$
C
$${9 \over {5R}}$$
D
$${4 \over {3R}}$$
4
IIT-JEE 2008 Paper 1 Offline
MCQ (More than One Correct Answer)
+4
-2

Assume that the nuclear binding energy per nucleon (B/A) versus mass number (A) is as shown in the figure. Use this plot to choose the correct choice(s) given below.

IIT-JEE 2008 Paper 1 Offline Physics - Atoms and Nuclei Question 6 English

A
Fusion of two nuclei with mass number lying in the range of 1 < A < 50 will release energy
B
Fusion of two nuclei with mass numbers lying in the range of 51 < A < 100 will release energy
C
Fission of a nucleus lying in the mass range of 100 < A < 200 will release energy when broken into two equal fragments
D
Fission of a nucleus lying in the mass range of 200 < A < 260 will release energy when broken into two equal fragments
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