Q1 of 20 Page 145

Answer the following questions.

How is charcoal made?

Charcoal is made by burning substances of plants origin (like wood) in an insufficient supply of oxygen.

Wood + oxygen (insufficient supply) → Charcoal


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1

Answer the following questions.

How is carbon dioxide gas produced in the laboratory?

 1

Answer the following questions.

Why is graphite used as a lubricant?

 2

Give scientific reasons.

Diamond is used to cut metals

 2

Give scientific reasons.

Carbon dioxide is used for putting out fires.