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AIIMS 2003
Exam
AIIMS
Year
2003
Subject
Chemistry
Chapter
Structure of Atom

AIIMS 2003 · Chemistry · Structure of Atom

Assertion : _ 11 ^ 22 Mg emits a positron giving (22)/(12) Mg ....

Assertion : 1122Mg{ }_{11}^{22} \mathrm{Mg} emits a positron giving 2212Mg\frac{22}{12} \mathrm{Mg}. Reason : In β+\beta^{+}emission neutron is transformed into proton.

Options

  1. AIf both assertion and reason are true and the reason is the correct explanation of the assertion
  2. BIf both assertion and reason are true and the reason is not the correct explanation of the assertion
  3. CIf assertion is true but reason is false
  4. DIf both assertion and reason are false.

Correct answer

D. If both assertion and reason are false.

Step-by-step solution

11Na22→12Mg22+−1β0{ }_{11} \mathrm{Na}^{22} \rightarrow{ }_{12} \mathrm{Mg}^{22}+{ }_{-1} \beta^0 It involves β\beta-particle emission. While positron emission is due to the conversion of proton into neutron. { }_1^1 p \rightarrow{ }_0^1 n+{ }_1^0 β\beta
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