Question: Q. 2. Why is it found experimentally difficult to detect neutrinos in nuclear $\beta$-decay ? [OD I, II, III 2014]
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Solution:
Ans. Neutrinos are neutral (chargeless), (almost) massless particles that hardly interact with matter.
Alternatively,
The neutrinos can penetrate large quantity of matter without any interaction.
[CBSE Marking Scheme 2014]