What would you observe in the following case: Sugar crystals are added to hard glass test tube containing concentrated sulphuric acid.
What do you observe when sugar crystals are added to hard glass test tube containing conc. sulphuric acid?
What would you observe when crystals of copper (II) sulphate and iron (II) sulphate are separately heated in two test tubes ?
What would you observe in the following case?
When carbon monoxide is passed over heated copper oxide.