1.

Identify the nuclear reaction that differs from the rest

Answer»

Positron emission
K-capture
`beta-`decay
`gamma-`decay

Solution :`beta-`emission occurs in those radioactive elements in which n/p ratio is higher than required for STABILITY. In `beta`-emission n/p ratio DECREASE, where as `alpha` emission , positron emission and K-capture occus in those elements in which n/p ratio is LOWER than required for stability. Alpha emission is USUALLY OBSERVED in nautral radioactive isotope while emission of positron or K-capture is observed in artificial radioactive isotope.
There is no change in n/p ratio due of `gamma`-emission


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