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Nuclei · Question 70

AIPMT 2001MCQEasy📈 Topic in 0% papers+4−1
1

Mn and Mp represent the mass of neutron and proton respectively. An element having mass M has N neutrons and Z protons, then the correct relation will be

  1. M < \N Mn + Z Mp\
  2. M > \N Mn + Z Mp\
  3. M = \N Mn + Z Mp\
  4. M = N\Mn + Mp\

Answer

(1) M < \N Mn + Z Mp\

Solution

When nucleons combine to form a nucleus, energy (binding energy) is released, so the mass of the nucleus is less than the sum of the masses of its free nucleons.

Mass defect: M = \N Mn + Z Mp\ - M > 0

∴ M < \N Mn + Z Mp\

Answer: (1)

AIPMT 2001

Keep practising — Nuclei

2

Energy released in nuclear fission is due to

  1. some mass is converted into energy
  2. total binding energy of fragments is more than the binding energy of parental element
  3. total binding energy of fragments is less than the binding energy of parental element
  4. total binding energy of fragments is equal to the binding energy of parental element
AIPMT 2001
3

Which rays contain (positive) charged particles?

  1. -rays
  2. -rays
  3. -rays
  4. X-rays
Out of syllabusAIPMT 2001
4

Half life of a radioactive element is 12.5 hours and its quantity is 256 g. After how much time its quantity will remain 1 g?

  1. 50 h
  2. 100 h
  3. 150 h
  4. 200 h
Out of syllabusAIPMT 2001
5

Nuclear fission is best explained by

  1. liquid drop model
  2. Yukawa -meson theory
  3. independent particle model of the nucleus
  4. proton-proton cycle
AIPMT 2000
6

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

  1. neutron
  2. anti neutrino
  3. neutrino
  4. proton
Out of syllabusAIPMT 2000
7

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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