Some Basic Concepts of Chemistry - Result Question 30 — JEE PYQ Chapterwise

31. The total number of electrons in one molecule of carbon dioxide is

(1979, 1M)

(a) 22

(b) 44

(c) 66

(d) 88

Show Answer

Answer:

Correct Answer: 31. (a)

Solution:

  1. In a neutral atom, atomic number represents the number of protons inside the nucleus and equal number of electrons around it. Therefore, the number of total electrons in molecule of $\mathrm{CO}_2$ $=$ electrons present in one carbon atom $+2 \times$ electrons present in one oxygen atom $=6+2 \times 8=22$.
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