SATHEE: Some Basic Concepts of Chemistry

Some Basic Concepts of Chemistry - Result Question 12

####12. 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 $75 k g$ person would gain if all $^{1} H$ atoms are replaced by $^{2} H$ atoms is

(a) $15 k g$

(b) $37.5 k g$

(d) $10 k g$

(2017 JEE Main)

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Solution:

Given, abundance of elements by mass oxygen $= 61.4$ , carbon $= 22.9$ , hydrogen $= 10$ and nitrogen $= 2.6$

Total weight of person $= 75 k g$

$Mass due to^{1} H = \frac{75 \times 10}{100} = 7.5 k g$

$^{1} H$ atoms are replaced by $^{2} H$ atoms,

Mass due to $^{2} H = (7.5 \times 2) k g$

$∴$ Mass gain by person $= 7.5 k g$

Some Basic Concepts of Chemistry - Result Question 12

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Some Basic Concepts of Chemistry - Result Question 12

Solution:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

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