Some Basic Concepts of Chemistry - Result Question 13
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
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Answer:
Correct Answer: 24. (d)
Solution:
- phosphorus acid is a dibasic acid as:
only two replaceable hydrogens
Therefore, normality $=$ molarity $\times$ basicity $=0.3 \times 2=0.60$
BETA
