Q. Answer the following logical questions 

1. Prove that 10+8+9= TEN(10)

2. What is the substituently prime number of 68-45

Q. Identify the substances that are oxidized and the substances that are reduced in the following reaction s.

1. 4Na(s)+O2(g)→2Na2O(s)

2. CuO(s)+H2(g)→Cu(s)+H2O(1)

                        
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