Some Basic Concepts of Chemistry - Result Question 13 — JEE PYQ Chapterwise

24. The normality of 0.3 M phosphorus acid $\left(\mathrm{H}_3 \mathrm{PO}_3\right)$ is

(1999, 2M)

(a) 0.1

(b) 0.9

(c) 0.3

(d) 0.6

Show Answer

Answer:

Correct Answer: 24. (d)

Solution:

  1. phosphorus acid is a dibasic acid as:

only two replaceable hydrogens

Therefore, normality $=$ molarity $\times$ basicity $=0.3 \times 2=0.60$

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