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Phosphorus allotropes, phosphine, halides and oxyacids of phosphorus

37 questions on Phosphorus allotropes, phosphine, halides and oxyacids of phosphorus from the p-Block Elements: Groups 15 and 16 chapter: 7 NEET level, 15 JEE Main, 15 JEE Advanced. Each one opens with its answer and solution.

Practice this topic All p-Block Elements: Groups 15 and 16 topics

White phosphorus is stored under water because it NEET level
Which of the following properties distinguishes red phosphorus from white phosphorus? NEET level
When white phosphorus is boiled with concentrated NaOH solution in an inert atmosphere, phosphine is formed along with NEET level
White phosphorus is far more reactive than red phosphorus mainly because JEE Main level
When phosphine is passed through an aqueous solution of copper(II) sulphate, the phosphorus-containing product is JEE Main level
Phosphorus pentachloride reacts with (i) a limited amount of water and (ii) excess water to give, respectively, JEE Main level
In solid PCl5, which exists as [PCl4]+[PCl6]-, the hybridisation of phosphorus in the cation and the anion respectively is JEE Main level
The basicities of H3PO2, H3PO3, H3PO4 and H4P2O7 are, respectively, JEE Main level
Phosphorus is in the +4 oxidation state in JEE Main level
Which of the following statements about the oxides of phosphorus are correct? JEE Main level
Which of the following statements about the allotropes of phosphorus are correct? JEE Main level
Calcium phosphide reacts with water: Ca3P2 + 6H2O -> 3Ca(OH)2 + 2PH3. A 9.10 g sample of pure Ca3P2 (atomic masses: Ca 40, P 31) is treated with excess water an... JEE Advanced level
Phosphorous acid disproportionates on heating: 4H3PO3 -> 3H3PO4 + PH3. Complete decomposition of 8.20 g of H3PO3 (molar mass 82 g mol^-1) gives how much phospho... JEE Advanced level
Let x be the total number of P-OH groups and y the total number of P=O bonds in one molecule each of H3PO2, H3PO3, H3PO4 and H4P2O7. The value of x+y is JEE Advanced level
A solution contains 0.0100 mol of H3PO2 and 0.0100 mol of H3PO3. Both are completely oxidised to H3PO4 by excess AgNO3 solution, which is reduced to silver meta... JEE Advanced level
Which of the following statements about the chlorides of phosphorus are correct? JEE Advanced level
Which of the following statements about the oxyacids of phosphorus are correct? JEE Advanced level
White phosphorus (12.4 g, P4; P = 31) is boiled with excess concentrated NaOH solution in an inert atmosphere: P4 + 3NaOH + 3H2O -> PH3 + 3NaH2PO2. The mass of ... JEE Advanced level
Phosphorus(V) oxide, P4O10, dehydrates concentrated nitric acid to its anhydride: 2HNO3 -> N2O5 + H2O (the water being taken up by P4O10). Using excess P4O10, t... JEE Advanced level
White phosphorus is stored under water because it NEET level
Which allotrope of phosphorus is thermodynamically the most stable and least reactive? NEET level
The oxidation state of phosphorus in H3PO3 is NEET level
When white phosphorus is boiled with concentrated NaOH solution in an inert atmosphere, phosphine is obtained along with NEET level
The total basicity (number of ionisable hydrogen atoms) of H3PO2, H3PO3 and H4P2O7 taken together is JEE Main level
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
Which of the following does NOT reduce silver nitrate solution to silver? 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 and is not ionisable. ... JEE Main level
Which of the following statements about white phosphorus is/are correct? JEE Advanced level
Which of the following statements about gaseous PCl5 is/are correct? JEE Advanced level
Select the correct statement(s) about phosphine. JEE Advanced level
Select the correct statement(s) about oxyacids of phosphorus. JEE Advanced level
On heating, 8.2 g of H3PO3 disproportionates completely according to 4H3PO3 -> 3H3PO4 + PH3. Volume of PH3 at STP is (H = 1, P = 31, O = 16; molar volume 22.4 L... JEE Advanced level
The total number of P-O-P bonds plus P=O bonds in one molecule of P4O10 is JEE Advanced level
A mixture contains 0.020 mol H3PO2, 0.015 mol H3PO3 and 0.010 mol H4P2O7. Volume of 0.50 M NaOH needed for complete neutralisation of all ionisable protons is JEE Advanced level