1. (a) Using an example in each case, define the following terms.
(i) Hygroscopic substance
(ii) Deliquescent substances
(iii) Efflorescent substances
(iv) Hydrated compound
(v) Anhydrous substance
2. (a) Magnesium ribborn was burnt in air until no further change. State what was observed.
(b) Define the following terms;
(i) Physical change
(ii) Chemical change
(iii) Mixtures
(iv) Compounds
- State four differences between a chemical change and physical change.
