1. (i) What name is given to the water in the compound copper sulphate-5-water?   2. (ii) If copper sulphate-5-water is heated, the water is driven off leaving anhydrous copper sulphate. (1) What is the colour of anhydrous copper sulphate?   3. (2 ) By what means, other than heating could you dehydrate copper sulphate-5-water and obtain anhydrous copper sulphate?   4. (iii) What is deliquescence?   5. (iv) Which one of the salts in the given list is deliquescent?