Question

H. Give reasons for the following.

1. Iron articles are often coated with paint.

2. Carbon dioxide gas is used in fire extinguishers.​

Answer 1

Answer:

1- So that iron may not rust and painting prevents rusting

2- Because it is a non combustible gas

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Answer 2

Answer:

1) because iron articles are prone to corrosion as they react with atmospheric moisture to give rust

2)because O2 is compound needed for burning if CO2 is sprayed instead that fire will extinguished