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Sulphur allotropes, SO2, sulphuric acid, oxyacids of sulphur

37 questions on Sulphur allotropes, SO2, sulphuric acid, oxyacids of sulphur from the p-Block Elements: Groups 15 and 16 chapter: 6 NEET level, 14 JEE Main, 17 JEE Advanced. Each one opens with its answer and solution.

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

The sulphur allotrope that is stable at room temperature is NEET level
The shape of the S8 molecule in rhombic sulphur is NEET level
Moist sulphur dioxide bleaches coloured flowers by NEET level
Rhombic sulphur changes into monoclinic sulphur on heating above 369 K. Which statement about the two forms is correct? JEE Main level
Copper is heated with concentrated sulphuric acid: Cu + 2H2SO4 -> CuSO4 + SO2 + 2H2O. For every mole of Cu dissolved, the number of moles of H2SO4 acting as the... JEE Main level
When sulphur dioxide is passed through acidified potassium dichromate solution, the colour changes from JEE Main level
In which of the following reactions does SO2 act as an oxidising agent? JEE Main level
In the contact process, the SO3 formed is absorbed in concentrated H2SO4 and not directly in water because JEE Main level
Pyrite (FeS2) is converted to sulphuric acid with an overall yield of 90% through the sequence FeS2 -> SO2 -> SO3 -> H2SO4 (all sulphur ends up as H2SO4 in 100%... JEE Main level
Select the correct statement(s) about sulphuric acid and its reactions. JEE Advanced level
Excess hot concentrated sulphuric acid reacts completely with 0.50 mol of carbon according to C + 2H2SO4 -> CO2 + 2SO2 + 2H2O. The water is condensed. The total... JEE Advanced level
Which of the following oxyacids of sulphur contain an O-O (peroxo) linkage? JEE Advanced level
Select the correct statement(s) about the sulphur dioxide molecule. JEE Advanced level
For the contact process 2SO2 + O2 <=> 2SO3 (Delta H < 0), select the correct statement(s). JEE Advanced level
One mole of SO2 combines completely with one mole of Cl2 in the presence of charcoal to give SO2Cl2, which is then hydrolysed completely by excess water to H2SO... JEE Advanced level
Thiosulphate reacts with iodine to give tetrathionate, but with excess chlorine water it is oxidised completely to sulphate. The ratio of moles of Cl2 to moles ... JEE Advanced level
Consider the statements: (i) Rhombic sulphur is insoluble in water but dissolves in CS2. (ii) Monoclinic sulphur is the stable form above 369 K. (iii) Sulphur v... JEE Advanced level
A sample of SO2 is bubbled through acidified KMnO4 solution until 100 mL of 0.200 M KMnO4 is just decolourised (5SO2 + 2MnO4- + 2H2O -> 5SO4^2- + 2Mn^2+ + 4H+).... JEE Advanced level
The stable allotropic form of sulphur at room temperature is NEET level
The catalyst used in the contact process for the manufacture of sulphuric acid is NEET level
The bleaching action of moist sulphur dioxide is due to NEET level
Copper reacts with hot concentrated sulphuric acid to give JEE Main level
Which oxyacid of sulphur has an S-S bond and sulphur in the +5 oxidation state? JEE Main level
Sulphur dioxide is passed through an acidified aqueous solution of ferric sulphate. The change observed and the reason are JEE Main level
Hydrogen sulphide gas is passed in excess into a solution of sulphur dioxide. The moles of sulphur formed per mole of SO2 consumed are JEE Main level
In the contact process, SO3 is absorbed in concentrated sulphuric acid and not directly in water because JEE Main level
The contact process is operated at about 720 K and not at much lower temperature, although the forward reaction is exothermic, because JEE Main level
When solid NaBr is heated with concentrated sulphuric acid, the products include JEE Main level
An oleum sample contains 35.0% free SO3 by mass, the rest being H2SO4. Oleum is labelled by the mass of pure H2SO4 obtainable from 100 g of it on adding enough ... JEE Main level
In the tetrathionate ion, S4O6^2- (structure ^-O3S-S-S-SO3^-), the oxidation numbers of the terminal and the middle sulphur atoms are, respectively JEE Advanced level
6.4 g of sulphur is heated with an excess of hot concentrated sulphuric acid according to S + 2H2SO4 -> 3SO2 + 2H2O. Volume of SO2 liberated at STP is (S = 32; ... JEE Advanced level
Consider the statements about oxyacids of sulphur: I. H2S2O8 contains one O-O linkage. II. H2S2O7 contains an S-O-S linkage. III. H2S2O6 contains an S-S bond. I... JEE Advanced level
Which of the following statements about sulphur dioxide is/are correct? JEE Advanced level
Which of the following statements about concentrated sulphuric acid is/are correct? JEE Advanced level
Select the correct statement(s) about the contact process. JEE Advanced level
Which of the following species contain(s) an S-S bond? JEE Advanced level
Pyrite (FeS2) of 80.0% purity is used to make sulphuric acid. Each mole of sulphur in the ore is converted to one mole of H2SO4 with an overall yield of 90.0%. ... JEE Advanced level