Q109 / 180 · AIIMS 2013 · Physics

Which of the following statement is incorrect?

A
Neutron is less stable than proton
B
Neutron can cause fission in nuclear reactors but proton can not
Correct answer
C
A free proton can emit beta particle.
D
A bound proton can emit beta particle

Solution

A free neutron is unstable $(n \rightarrow p+\bar{e}+\bar{v})$. But a simlar free proton decay is not possible, since a proton is (slightly) lighter than a neutron.

Hence, the correct answer is option: 'C'.

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