1.

Match the following.Group – AGroup – B1) NitrogenA) 21% in air2) OxygenB) 97% of water on earth3) Carbon dioxideC) 78% in air4) Fresh waterD) 2% of water on earth5) Salt waterE) 0.04% in airF) 3% of water on earthG) 0.05% in air

Answer»
Group – AGroup – B
1) NitrogenC) 78% in air
2) OxygenA) 21% in air
3) Carbon dioxideE) 0.04% in air
4) Fresh waterF) 3% of water on earth
5) Salt waterB) 97% of water on earth


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