Question

Attempt either option (A) or (B):

(A) Write chemical equations for the following when (a) Silver bromide is exposed to sunlight. (b) A piece of lead metal is dropped into copper (II) chloride solution. (c) Hydrogen gas is passed over heated copper oxide. (d) Methane gas is burnt in air. (e) Quick lime is mixed with water.

Accepted Answer

(a) $2	ext{AgBr}(s) \xrightarrow{	ext{Sunlight}} 2	ext{Ag}(s) + 	ext{Br}_2(g)$ (b) 	ext{Pb}(s) + 	ext{CuCl}_2(aq) ightarrow 	ext{PbCl}_2(aq) + 	ext{Cu}(s) (c) 	ext{CuO}(s) + 	ext{H}_2(g) \xrightarrow{\Delta} 	ext{Cu}(s) + 	ext{H}_2	ext{O}(g) (d) 	ext{CH}_4(g) + 2	ext{O}_2(g) ightarrow 	ext{CO}_2(g) + 2	ext{H}_2	ext{O}(g) + 	ext{Heat} (e) 	ext{CaO}(s) + 	ext{H}_2	ext{O}(l) ightarrow 	ext{Ca(OH)}_2(aq) + 	ext{Heat}

Five chemical equations

Explanation

Practise this under board exam conditions