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Match the process given in column-I with characteristics in column-II
COLUMN-I
COLUMN-II
A) $α -$ decay P) Atomic number decreases by 1
B) $β^{+} -$ decay Q) mass number decreases by 4 and atomic number decreases by 2
C) $β^{-} -$ decay R) Atomic number increases by 1
D) $γ$ -decay S) Both atomic and mass numbers do not change
T) Both atomic and mass numbers change by 2

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$A \to Q, B \to T, C \to R, D \to Q$

$A \to P, B \to R, C \to S, D \to T$

$A \to Q, B \to P, C \to R, D \to S$

$A \to T, B \to Q, C \to P, D \to S$

answer is C.

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Detailed Solution

For $α$ decay $A ↓ 4, Z ↓ 2$
For $β^{+}$ decay A=same, $Z ↓ 1$
For $β^{-}$ decay A=same $Z ↑ 1$
For $γ -$ decay (A, Z)=same

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