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Question

The discovery of neutron was made on the basis of conservation principle of

A
momentum
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B
momentum and energy
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C
charge
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D
charge and energy
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Solution

The correct option is D charge and energy
From the given paragraph, when protons were used to bombard Li and it was found that α-particles were produced along with release of energy in the form of radiation. There was always conservation of momentum, charge and energy. These conservation principles can be used to determine the nature of the unknown particles which was neutron.

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