The ratio of the nuclear radii of elements with mass numbers 216 and 125 is
Options
(a) (6:5) (b) √216:√125 (c) 218:05:00 (d) None of these
Correct Answer:
(6:5)
Explanation:
Nuclear radius of the […]
The ratio of minimum wavelengths of Lyman and Balmer series will be
Options
(a) 5 (b) 10 (c) 1.25 (d) 0.25
Correct Answer:
0.25
Explanation:
Minimum wavelength is for higher energy n = 1 […]
Which of the following transitions in hydrogen atoms emit photons of highest frequency?
Options
(a) n=1 to n=2 (b) n=2 to n=6 (c) n=6 to n=2 (d) n=2 to n=1
Correct Answer:
n=2 […]
Calculate power output of ₉₂²³⁵U reactor, if it takes 30 days to use up 2 kg of fuel, and if each fission gives 185 MeV of useable energy. Avagadro’s number=6×10²³/mol?
Options
(a) 56.3 […]
Rutherford’s α-scattering experiment concludes that
Options
(a) there is a heavy mass at centre (b) electrons are revolving around the nucleus (c) both (a) and (b) (d) None of these
Correct Answer:
there […]
Mass defect is known as
Options
(a) ionisation energy (b) binding energy (c) packing fraction (d) activity
Correct Answer:
binding energy
Explanation:
No explanation available. Be the first to write the explanation for […]
In the Bohr’s model of hydrogen atom, the ratio of the kinetic energy to the total energy of the electron in nth quantum state is
Options
(a) (-1) (b) (+1) (c) (-2) (d) (+2)
Bohr’s postulates quantizes
Options
(a) atomic mass (b) charge (c) angular momentum (d) energy
Correct Answer:
angular momentum
Explanation:
No explanation available. Be the first to write the explanation for this question by […]
Which of the following does not increase regularly?
Options
(a) mass number (b) atomic number (c) packing fraction (d) binding energy
Correct Answer:
packing fraction
Explanation:
Mass number, atomic number and binding energy increases […]
The volume of a nucleus is directly proportional to
Options
(a) A (b) A³ (c) √A (d) A¹/₃
Correct Answer:
A
Explanation:
Radius of nucleus R = R₀ A¹/³ where R₀ = 1.2 × […]
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