(a) Give one physical property of
(i) diamond;
(ii) graphite
(b) Give two uses of diamond
(c) evidence that shows that both graphite and diamond are allotropes of carbon.
Explanation
(a)(i) Diamond is hard
(ii) Graphite is soft
(b) Diamond is used for making/cutting instrument for hard substances. Diamond is used for making jewelleries because of its characteristic lustre.
(c) When graphite and diamond are respectively burnt in excess of air, they produce carbon (IV) oxide which shows that graphite and diamond are allotopes of carbon i.e. C(_{(S)}) + O(_{2(g)}) (to) CO(_{2(g)})