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JEE PHYSICS MCQ: NUCLEI
1
Medium
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Analyzing
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Assertion: A free neutron decays to a proton but a free proton
does not decay to a neutron.
Reason: Neutron has larger rest mass than the proton.
does not decay to a neutron.
Reason: Neutron has larger rest mass than the proton.
View answer and explanation
Correct option: D
If both assertion and reason are false
Option D is correct. A free neutron decays into a proton, an electron, and an antineutrino. A free proton cannot decay into a neutron because it violates energy conservation. The neutron has a larger rest mass than the proton, so the reason is correct, but the assertion is false.
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