JEE Main · 2017 · 02 Apr 2017 · Offline · Hydrogen

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The most abundant elements by mass in the body of a healthy human adult are : Oxygen ( ); Carbon ( ), Hydrogen ( ); and Nitrogen ( ). The weight which a 75 kg person would gain if all atoms are replaced by atoms is :
  1. (A)15 kg
  2. (B)37.5 kg
  3. (C)7.5 kg✓ Correct
  4. (D)10 kg

Answer: (C)

Solution

Hydrogen makes up of the kg body, that is kg of . Replacing every protium by deuterium doubles the mass of that hydrogen to kg, a gain of kg.

JEE Main · 2017 · 02 Apr 2017 · Offline · Single correct option

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