Which of the following atoms has the lowest ionization potential
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(a) |
(b) |
(c) |
(d) |
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Which of the following atoms has the lowest ionization potential
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(a) |
(b) |
(c) |
(d) |
Assertion : For the scattering of a-particles at a large angles, only the nucleus of the atom is responsible.
Reason : Nucleus is very heavy in comparison to electrons.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(c) If assertion is true but reason is false. |
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(d) If the assertion and reason both are false. |
The Bohr model of atoms
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(a) Assumes that the angular momentum of electrons is quantized |
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(b) Uses Einstein’s photo-electric equation |
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(c) Predicts continuous emission spectra for atoms |
| (d) Predicts the same emission spectra for all types of atoms |
On the bombardment of neutron with Boron. a-particle is emitted and product nuclei formed is
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(a) |
(b) |
(c) |
(d) |
During the nuclear fusion reaction
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(a) A heavy nucleus breaks into two fragments by itself |
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(b) A light nucleus bombarded by thermal neutrons breaks up |
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(c) A heavy nucleus bombarded by thermal neutrons breaks up |
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(d) Two light nuclei combine to give a heavier nucleus and possibly other products |
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