As compared to 12C atom, 14C atom has:

1. two extra protons and two extra electrons
2. two extra protons but no extra electron
3. two extra neutrons and no extra electron
4. two extra neutrons and two extra electrons

Subtopic:  Nuclear Energy |
 82%
From NCERT
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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
Subtopic:  Nuclear Energy |
 74%
From NCERT
AIPMT - 2003
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