Multiple choice

What is the basicity of phosphorus acid?

  1. 1

  2. 2

  3. 3

  4. 4
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This option is correct and can be explained as follows: Basicity is defined as the number of replaceable H atoms. Since phosphorus acid H3PO3 has only two replaceable atoms its basicity is two.

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