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Question

Mark the correct option, for the substance which cannot be emitted by radioactive substance during their decay:


A
electrons
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B
protons
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C
neutrinoes
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D
helium nuclei
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Solution

The correct option is C protons

As we learned in the Property of neutrino which has Zero electric charge. It's mass much less than a mass of an electron. Spin is 1/2 particle. Very weak matter making it quite difficult to detect. During the nuclear process, particles emitted are \alpha,\ \beta  or \gamma  and the neutrino. 

No proton or neutrons are emitted. Hence the correct answer is option B


Physics
NCERT
Standard XII

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