1.

Fill in the blanks: 1. ……… is called as vital life. 2. Nitrogen is ……… than air. 3. ………is used as a fertilizer. 4. Dry ice is used as a ……… 5. The process of conversion of iron into hydrated form of oxides is called …………

Answer»

1. Oxygen 

2. lighter 

3. Nitrogen 

4. refrigerant 

5. rusting



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