Match the following:
(i)Water(A)Compound(ii) Hydrogen(B) Element(iii) Salt(iv) Gold(v) Carbon dioxide(vi) Iron
The correct pairs are:-
(i, iii, v) – A, (ii, iv, vi) - B
Water (H2O ) is composed of hydrogen and oxygen. Therefore, it is a compound.
Hydrogen is an element.
Salt (NaCl) is composed of sodium and chlorine. Therefore it is a compound.
Gold is an element.
Carbon dioxide is composed of carbon and oxygen. Therefore, it is a compound.
Iron is an element.