MolSynapsequestion bank

MolSynapse / Question bank / p-Block Elements: Groups 15 and 16 / Phosphorus allotropes, phosphine, halides and oxyacids of phosphorus

JEE Main levelSingle correct optionDifficulty 2 of 3pn137

Which of the following does NOT reduce silver nitrate solution to silver?

A $H X_{3} PO X_{3}$
B $H X_{3} PO X_{4}$
C $H X_{3} PO X_{2}$
D $NaH X_{2} PO X_{2}$

Answer: B

H3PO2, H3PO3 and the hypophosphite ion contain P-H bonds and are good reducing agents; they reduce

Ag X^{+}

to Ag. In H3PO4 phosphorus is already in the +5 state and no P-H bond is present, so it is not a reductant.

Practice p-Block Elements: Groups 15 and 16 More on Phosphorus allotropes, phosphine, halides and oxyacids of phosphorus

Previous questionNext question

More questions on Phosphorus allotropes, phosphine, halides and oxyacids of phosphorus

Phosphorus pentachloride is treated with an excess of hot water. The phosphorus-containing product is JEE Main level
In the solid state, phosphorus pentachloride exists as JEE Main level
Upon heating, orthophosphorous acid disproportionates to give JEE Main level
Pyrophosphoric acid, H4P2O7, has (number of P-O-P linkages, basicity, oxidation state of P) equal to JEE Main level
Assertion (A): H3PO3 is a dibasic acid even though it has three hydrogen atoms. Reason (R): One hydrogen is bonded directly to phosphorus an... JEE Main level
Which of the following statements about white phosphorus is/are correct? JEE Advanced level