Q61 · CSIR-NET Chemistry, December 2013
Paper: CSIR-NET December 2013 · Subject: Inorganic Chemistry · Chapter: Main Group Elements · Topic: Main Group Elements – General · Marks: 2 · Difficulty: Medium
Two tautomeric forms of phosphorus acid are
(a)
and 
and (b)
and 
and (c)
and 
and (d)
and 
and Answer
Answer: A ✓ checked by 4AB · confidence high
Explanation
Phosphorous acid exists as the minor P(OH)₃ tautomer and the dominant HP(O)(OH)₂ (a).
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