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Nuclei · Question 75

AIPMT 2000MCQEasy📈 Topic in 50% papers+4−1
1

For the given reaction, the particle X is 6C11 5B11 + + + X

  1. neutron
  2. anti neutrino
  3. neutrino
  4. proton

Answer

(3) neutrino

Solution

∵ In + decay a proton in the nucleus changes into a neutron, emitting a positron and a neutrino:

p n + e+ +

Mass number (11) and charge (6 = 5 + 1) are already balanced, so X has zero charge and zero mass number.

∴ X is a neutrino ( ).

Answer: (3)

Out of syllabusAIPMT 2000

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2

The relation between and T1/2 is ( T1/2 half-life)

  1. T1/2 = 2
  2. T1/2 2 =
  3. T1/2 = 1
  4. ( + T1/2) = 2
Out of syllabusAIPMT 2000

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