1.

State observation for each of the following : i.  Excess ammonium hydroxide solution is added to lead nitrate solution. ii.  Bromine vapors are passed into a solution of ethyne in carbon tetrachloride.iii.  A zinc granule is added to copper sulphate solution. iv.  Zinc nitrate crystals are strongly heated. v.  Sodium hydroxide solution is added to ferric chloride solution at first a little and then in excess

Answer»

(i)  A white ppt. of lead hydroxide

(ii)  A colorless solution is obtained and brown color of bromine vapors disappear.

(iii)  A red shiny metal starts precipitating

(iv)  A reddish brown gas is liberated.

(v)  A reddish brown ppt. of ferric hydroxide is formed which remains insoluble in excess of sodium hydroxide.



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