According to Bohr model of hydrogen atom, only those orbits are permissible which satisfy the condition
Options
(a) mv=nh (b) mv²/r=n(h/2π) (c) mvr=n(h/2π) (d) mvr²=n(h/2π)
Correct Answer:
mvr=n(h/2π)
Explanation:
No explanation available. Be […]
₆C¹⁴ absorbs an energitic neutron and emits beta particles. The resulting nucleus is
Options
(a) ₇N¹⁴ (b) ₇N¹³ (c) ₅B¹³ (d) ₆C¹³
Correct Answer:
₇N¹³
Explanation:
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1 a.m.u. is equivalent to
Options
(a) 1.6×10⁻¹² J (b) 1.6×10⁻¹⁹ J (c) 1.5×10⁻¹⁰ J (d) 1.5×10⁻¹⁹ J
Correct Answer:
1.5×10⁻¹⁰ J
Explanation:
No explanation available. Be the first to write the explanation […]
A photon of wavelength 300nm interacts with a stationary hydrogen atom in ground state. During the interaction, whole energy of the photon is transferred to the electron of the atom. State which possibility is correct. […]
As per Bohr model, the minimum energy (in eV) required to remove an electron from the ground state of doubly ionised Li-atom (Z=3) is
Options
(a) 1.51 (b) 28.7 (c) 53.9 (d) 122.4
A photon of energy 10.2 eV collide inelastically with hydrogen atom in ground state after few microseconds another photon of energy 15 eV collides inelastically with same hydrogen atom. Finally by a suitable detector we […]
The rest energy of an electron is
Options
(a) 1 MeV (b) 930 Mev (c) 0.053 MeV (d) none of these
Correct Answer:
0.053 MeV
Explanation:
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Electrons in the atom are held to the nucleus by
Options
(a) Coulomb’s forces (b) nuclear forces (c) van der waal’s forces (d) gravitational forces
Correct Answer:
Coulomb’s forces
Explanation:
No explanation available. […]
Mass of the nucleons together in a heavy nucleus is
Options
(a) greater than mass of nucleus (b) equal to mass of nucleus (c) less than mass of nucleus (d) any of these
Rutherford’s ∝ particle experiment showed that the atoms have
Options
(a) proton (b) nucleus (c) neutron (d) electron
Correct Answer:
nucleus
Explanation:
No explanation available. Be the first to write the explanation for […]
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