Addition Of Sodium Bisulphite

Correct stament for nucleophlic addition of sodium bisulphate on carbonyl compounds is :

Which one of the following compounds reacts with saturated solution of sodium bisulphite to give colourless crystalline products?

Reaction OF NaHSO3, H-OH, R-OH with Aldyhyde and Ketone, Sodium Bisulphite Test

Write the balanced chemical equations for the following reactions. a. An aqueous solution solution of sodium nitrite is heated with zinc dust and caustic soda solution. b. Sodium iodate is added to a solution of sodium bisulphite.

Write the balanced chemical equations for the following reactions. a. An aqueous solution solution of sodium nitrite is heated with zinc dust and caustic soda solution. b. Sodium iodate is added to a solution of sodium bisulphite.

Sodium iodate is treated with calculated amount of sodium bisulphite to prepare one mole of iodine. How many moles of sodium disulphite are required to prepare one mole of iodine form sodium iodate ?