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JEE Main 201323 AprilOnline
Exam
JEE Main
Year
2013
Date
23 April
Mode
Online
Subject
Chemistry
Chapter
Hydrogen

JEE Main 2013 · 23 April · Online · Chemistry · Hydrogen

The numbers of protons, electrons and neutrons in a molecule of...

The numbers of protons, electrons and neutrons in a molecule of heavy water are respectively :

Options

  1. A8,10,118,10,11
  2. B10,10,1010,10,10
  3. C10,11,1010,11,10
  4. D11,10,1011,10,10

Correct answer

B. 10,10,1010,10,10

Step-by-step solution

Heavy water is D2O\mathrm{D}_2 \mathrm{O} hence number of electrons =2+8=10=2+8=10 number of protons =10=10 Atomic mass of D2O=4+16=20\mathrm{D}_2 \mathrm{O}=4+16=20 hence number of neutron = Atomic mass −- number of protons =20-10=10
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