The sides of safety matches contains

Fill in the Blanks : The sides of the matchbox contains _______.

The head of a safety matchstick contains

The right side of the heart contains only ______blood.

The phosphorus used in the manufacture of safety matches is

Which oxide of lead is used in lead storage batteries, in safety matches and is a powerful oxidising agent.

An oxide of lead which is used in lead storage batteries, in safety matches and is a powerful oxidising agent is