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Q.

The equation of the reaction when aluminium is heated in air is given below. 

xAl+yO2→zAl2O3  

The value of 'z' when the reaction is balanced is : 

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a

2

b

1

c

3

d

4

answer is B.

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Detailed Solution

x=4,  y=3   &  z=2  

3Al+3O2→2Al2O3  

So coefficient of Al2O3=2 . 

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