JEE Main 2017Session, Shift 1ChemistryMediumSome Basic Concepts in Chemistry88× since 2002
The most abundant elements by mass in the body of a healthy human adult are: Oxygen (61.4%); Carbon
(22.9%), Hydrogen (10.0%); and Nitrogen (2.6%). The weight which a 75 kg person would gain if all
¹H atoms are replaced by ²H atoms is: