I. Alpha
Il. Gamma
IIl. Beta
A. I < III < II
B. II < I < III
C. II < III < I
D. I < II
Correct Answer:
Option C – II < III < I
Explanation
Alpha particles are highly ionising because of their double positive charge, large mass (compared to a beta particle) and because they are relatively slow.
They can cause multiple ionisations within a very small distance.
And the gamma radiation has the least ionising power.
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