Question
Giving reasons, choose the elements from the following substances:
(i) Stainless steel, (ii) Diamond, (iii) Graphite,
(iv) Iron filings, (v) Soda water, (vi) Common salt.
Solution
Element are made of only one kind of substance. i.e.,
(iv) Iron filings is an element as it is made up of only iron (Fe) atoms. (ii) Diamond and (iii) graphite are also composed of carbon atoms.
Other substances are not elements, since these are made of different substance.
(i) Stainless steel is a mixture of varying amounts of iron and carbon.
(v) Soda water is a mixture of carbon dioxide in water.
(vi) Common salt (NaCl) is a compound of sodium and chlorine.
