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Q.

Arrange the following rules in the order to write chemical formula according to criss-cross method 

(i) Write the valencies

            (ii) Write the constituent elements in the compound

            (iii) Cross over the valencies of the combines atoms  

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a

i, ii, iii

b

iii, ii, i

c

ii, i, iii

d

i, iii, ii

answer is B.

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Detailed Solution

These are the rules for the criss-cross method.

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Arrange the following rules in the order to write chemical formula according to criss-cross method (i) Write the valencies            (ii) Write the constituent elements in the compound            (iii) Cross over the valencies of the combines atoms