In which pair of ions both the species contain S-S bond?
Hot concentrated sulphuric acid is a moderately strong oxidising agent. Which of the following reaction doe not show oxidising behaviour?
(a) Cu + 2H2SO4 CuSO4 + SO2 + 2H2O
(b) 3S + 2H2SO4 3SO2 + 2H2O
(c) C + 2H2SO4 CO2 + 2SO2 + 2H2O
(d) CaF2 + H2SO4 CaSO4 + 2HF
Sulphur trioxide can be obtained by which of the following reaction
(a) CaSO4 + C (b) Fe2(SO4)3
(c) S + H2SO4 (d) H2SO4 + PCl5
What happens when :
(i) SO2 gas is passed through an aqueous solution Fe3+ salt ?
(ii) XeF4 reacts with SbF5 ? (2)
Arrange the following in the order of property indicated against each set :
(i) HF, HCl, HBr, HI - increasing bond dissociation enthalpy.
(ii) - increasing acidic character.