Home Chemistry S and P - Block Elements (S - Block Elements Not In Syllabus ) Compounds of Nitrogen and Phosphorus Phosphorus trichloride, PCl3undergoes, hydro…
Chemistry S and P - Block Elements (S - Block Elements Not In Syllabus ) Compounds of Nitrogen and Phosphorus Single Correct MCQ
Published on: August 13, 2026

Phosphorus trichloride, PCl3undergoes, hydrolysis at room temperature to produce an oxoacid. It has the formula :

A
HPO3
B
H3PO3
C
H3PO4
D
H3PO2

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The correct answer is:
B

The spontaneous combustion of phosphine is technically used in Holme’s samples. Containers containing calcium carbide and calcium phosphide are pierced and thrown in the sea when the gases evolved burn and serve as a signal.

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