Structures of oxyacids and oxides

38 questions on Structures of oxyacids and oxides from the p-Block Elements: Groups 15 and 16 chapter: 6 NEET level, 15 JEE Main, 17 JEE Advanced. Each one opens with its answer and solution.

• The basicity of phosphorous acid, H3PO3, is NEET level
• The hybridisation of nitrogen in the nitrate ion, NO3-, and its shape are NEET level
• Which one of the following aqueous acids will NOT reduce silver nitrate solution to metallic silver? JEE Main level
• The number of sigma bonds in gaseous dinitrogen pentoxide, O2N-O-NO2, is JEE Main level
• The number of P-O-P bridges in a molecule of P4O10 is JEE Main level
• The oxidation state of phosphorus in hypophosphoric acid, H4P2O6, (which contains a P-P bond) is JEE Main level
• Complete hydrolysis of one mole of peroxodisulphuric acid, H2S2O8, gives JEE Main level
• Select the correct statement(s) about basicity. JEE Main level
• Select the correct statement(s) about nitric acid and the nitrate ion. JEE Main level
• Arrange the following oxyacids of sulphur in increasing order of the (average) oxidation state of sulphur: H2S2O3, H2S2O4, H2S2O6, H2S2O7. JEE Advanced level
• One mole of P4O10 and one mole of P4O6 are separately treated with excess water, and each product is completely neutralised with NaOH (all replaceable hydrogens... JEE Advanced level
• In P4O10 all P-O bonds are counted as sigma bonds (6 bridging O atoms with two bonds each and 4 terminal O atoms with one sigma bond each); in P4O6 the structur... JEE Advanced level
• On heating, phosphorous acid disproportionates: 4H3PO3 -> 3H3PO4 + PH3. If 2.0 mol of H3PO3 is heated completely, the number of moles of NaOH needed to neutrali... JEE Advanced level
• Pyrosulphuric acid, H2S2O7, is drawn with two S=O bonds on each S atom, two S-OH groups and one S-O-S bridge. The total number of sigma bonds in one molecule is JEE Advanced level
• 9.2 g of NO2 is completely absorbed in excess cold aqueous NaOH: 2NO2 + 2NaOH -> NaNO2 + NaNO3 + H2O. Taking N = 14, O = 16, Na = 23, the total mass of the two ... JEE Advanced level
• Select the correct statement(s) about peroxomonosulphuric acid, H2SO5 (Caro's acid). JEE Advanced level
• Select the correct statement(s) about the oxides of nitrogen. JEE Advanced level
• Select the correct statement(s) about the oxides of phosphorus. JEE Advanced level
• One mole of pyrophosphoric acid, H4P2O7, is (a) neutralised directly with NaOH using all replaceable hydrogens, and (b) first hydrolysed completely to H3PO4 and... JEE Advanced level
• The number of P-O-P linkages in one molecule of P4O10 is NEET level
• The basicity of phosphorous acid, H3PO3, is NEET level
• The hybridisation of sulphur in SO3 (gas phase monomer) is NEET level
• The number of S=O bonds in a molecule of sulphuric acid, H2SO4, is NEET level
• Hypophosphorous acid, H3PO2, contains how many P-H bonds and how many P-OH groups respectively? JEE Main level
• In peroxodisulphuric acid, H2S2O8, the oxidation state of sulphur and the number of S=O bonds are respectively JEE Main level
• The total basicity of H3PO2, H3PO3 and pyrophosphoric acid H4P2O7 (sum of the three values) is JEE Main level
• Which of the following species has a pyramidal shape? JEE Main level
• Assertion (A): H3PO3 is a dibasic acid. Reason (R): Only the hydrogens present in P-OH groups are ionisable, and H3PO3 has two such groups. JEE Main level
• Peroxomonosulphuric acid (Caro's acid), H2SO5, contains one peroxo link. The oxidation state of S, the number of S=O bonds and the number of O-O bonds are respe... JEE Main level
• Select the correct statement(s) about pyrosulphuric acid, H2S2O7. JEE Main level
• Select the correct statement(s) about orthophosphoric acid, H3PO4. JEE Main level
• Oleum is considered to be a mixture of H2SO4 and free SO3. A sample of oleum contains 30% SO3 by mass. On adding enough water, all SO3 is converted to H2SO4 (SO... JEE Advanced level
• Select the correct statement(s) about oxoacids of phosphorus. JEE Advanced level
• Select the correct statement(s) about oxoacids of sulphur. JEE Advanced level
• Count, for one molecule each of P4O6 and P4O10, the P-O-P linkages in both molecules together with the P=O bonds in P4O10. The total is JEE Advanced level
• Sum the oxidation states of all sulphur atoms (use the average value per S atom where needed) in one molecule each of H2S2O8 (peroxo acid), H2S2O7 and H2S2O3. T... JEE Advanced level
• Match the oxoacid in Column I with a structural feature in Column II. Column I: (A) H4P2O7 (B) H3PO3 (C) H3PO2 (D) H2S2O8. Column II: (p) contains a P-O-P bridg... JEE Advanced level
• Using the structure HO-SO2-O-SO2-OH for pyrosulphuric acid and counting each S=O as one sigma plus one pi bond, the total number of sigma and pi bonds in one H2... JEE Advanced level