IGCSE Chemistry: Specimen Questions with Answers 151 - 153 of 240

Answer

d.

Explanation

Silver nitrate is made mainly from nitric acid.

Silver nitrate can be prepared by reacting silver, such as a silver bullion or silver foil, with nitric acid, resulting in silver nitrate, water, and oxides of nitrogen. Reaction byproducts depend upon the concentration of nitric acid used.

This is performed under a fume hood because of toxic nitrogen oxide (s) evolved during the reaction.

Explanation

Complete structure is given below.

Answer

c.

Explanation

Arrhenius said that all those substances that give ions as the only positively charged ions in a solution are acids. As ion is unstable, so it combines with water to form ion. So all those substances that give ions as the only positively charged ions in a solution are acids.