This one too
Solution (i) Hydrogen gas
(ii) A characteristic test for hydrogen (H2) gas can be performed by bringing a burning candle near the source of hydrogen. On doing so, hydrogen gas burns with a squeaky pop sound. Hydrogen gas is recognized by the 'pop' when it burns.
(iii) Zinc reacts with dilute hydrochloric acid to give zinc chloride and hydrogen gas.
Zinc reacts with sodium hydroxide to produce sodium zincate (salt) and hydrogen gas.
(ii) A characteristic test for hydrogen (H2) gas can be performed by bringing a burning candle near the source of hydrogen. On doing so, hydrogen gas burns with a squeaky pop sound. Hydrogen gas is recognized by the 'pop' when it burns.
(iii) Zinc reacts with dilute hydrochloric acid to give zinc chloride and hydrogen gas.
Zinc reacts with sodium hydroxide to produce sodium zincate (salt) and hydrogen gas.