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Nuclei · Question 60

AIPMT 2003MCQEasy📈 Topic in 0% papers+4−1
1

Solar energy is mainly caused due to

  1. burning of hydrogen in the oxygen
  2. fission of uranium present in the Sun
  3. fusion of protons during synthesis of heavier elements
  4. gravitational contraction

Answer

(3) fusion of protons during synthesis of heavier elements

Solution

As per NCERT, the energy of the Sun is generated by thermonuclear fusion in its core (proton–proton cycle), where four protons (hydrogen nuclei) combine to form a helium nucleus:

4 11H + 2e- 42He + 2 + 6 + 26.7 MeV

∴ Solar energy is due to fusion of protons during synthesis of heavier elements.

Answer: (3)

AIPMT 2003

Keep practising — Nuclei

2

The volume occupied by an atom is greater than the volume of the nucleus by a factor of about

  1. 101
  2. 105
  3. 1010
  4. 1015
AIPMT 2003
3

The mass of proton is 1.0073 u and that of neutron is 1.0087 u (u = atomic mass unit). The binding energy of 42He is (Given helium nucleus mass ≈ 4.0015 u.)

  1. 0.0305 J
  2. 0.0305 erg
  3. 28.4 MeV
  4. 0.061 u
AIPMT 2003
4

A sample of radioactive element has a mass of 10 g at an instant t = 0. The approximate mass of this element in the sample after two mean lives is

  1. 1.35 g
  2. 2.50 g
  3. 3.70 g
  4. 6.30 g
Out of syllabusAIPMT 2003
5

The mass number of a nucleus is

  1. always less than its atomic number
  2. always more than its atomic number
  3. sometimes equal to its atomic number
  4. sometimes less than and sometimes more than its atomic number
Out of syllabusAIPMT 2003
6

A nuclear reaction given by ZXA Z+1YA + -1e0 + represents

  1. -decay
  2. -decay
  3. fusion
  4. fission
Out of syllabusAIPMT 2003
7

Which of the following are suitable for the fusion process?

  1. light nuclei
  2. heavy nuclei
  3. elements lying in the middle of the periodic table
  4. middle elements, which are lying on binding energy curve.
AIPMT 2002
8

A deuteron is bombarded on 8O16 nucleus, then an -particle is emitted. The product nucleus is

  1. 7N13
  2. 5B10
  3. 4Be9
  4. 7N14
AIPMT 2002
9

A sample of radioactive element containing 4 1016 active nuclei. Half-life of element is 10 days, then number of decayed nuclei after 30 days

  1. 0.5 1016
  2. 2 1016
  3. 3.5 1016
  4. 1 1016
Out of syllabusAIPMT 2002
10

X(n, ) 73Li, then X will be

  1. 105B
  2. 95B
  3. 114Be
  4. 42He
AIPMT 2001
11

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\
AIPMT 2001

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