From the methods (or techniques) of distillation, filtration, fractional distillation, chromatography, crystallisation, select and write down the technique you would use to separate : Unused zinc after the reaction of excess of zinc with dilute sulphuric acid.

From the methods (or techniques) of distillation, filtration, fractional distillation, chromatography, crystallisation, select and write down the technique you would use to separate : Nitrogen from liquid air.

From the methods (or techniques) of distillation, filtration, fractional distillation, chromatography, crystallisation, select and write down the technique you would use to separate :Constituents of colouring matter in ink.

From the methods (or techniques) of distillation, filtration, fractional distillation, chromatography, crystallisation, select and write down the technique you would use to separate : Hydrated copper (II) sulphate or blue vitriol from its aqueous solution.

. From the following techniques: Distillation, filtration, fractional distillation, chromatography, crystallisation, sublimation, evaporation, decantation, sedimentation. Select the method you will use to separate : Petrol from crude oil.

. From the following techniques: Distillation, filtration, fractional distillation, chromatography, crystallisation, sublimation, evaporation, decantation, sedimentation. Select the method you will use to separate : Common salt from sea-water.

. From the following techniques: Distillation, filtration, fractional distillation, chromatography, crystallisation, sublimation, evaporation, decantation, sedimentation. Select the method you will use to separate : the constituents of the colouring matter of ink.

. From the following techniques: Distillation, filtration, fractional distillation, chromatography, crystallisation, sublimation, evaporation, decantation, sedimentation. Select the method you will use to separate : hydratedCuS04from its aqueous solution.

Write word equations and then balanced equations for the reactions taking place when -dilute sulphuric acid reacts with zinc granules.