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1. Zinc Oxide is a

 

 

 

 

 

2. What is the concentration of a solution containing 2g of NaOH in 100cm^3 of solution? [Na=23, )=16, H=1]

 

 

 

 

 

3.

Iron is often galvanized in order to

 

 

 

 

4.

One of the methods used for combating air pollution is

 

 

 

 

 

5.

The energy value of petrol can be determined by a

 

 

 

 

 

 

 


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