1. An organic compound A and C8H6 on treatment with dilute sulphuric acid containing mercuric sulphate gives a compound B, which can also be obtained from a reaction of benzene with an acid chloride in the presence of anhydrous aluminium chloride. Can you identify A and B.
2. Give reasons: In acylium ion, the structure R-C≡O+ is more stable tha the R-C+=0.
3. 8.0575×10-2 kg of Glauber's salt is dissolved in water to obtain 1 dm3 of a solution of density 1077.2 kgm-3. calculate the molarity, molality and mole fraction of Na2SO4 in the solution.
4. Is K3[VF6] coloured?
5. Complete and balance the reaction
Sn + 2KOH + 4H2O---> ...+...