Arrange the following points in sequence for the derivation of formulae of compounds
i) The valencies of the ions or radicals are written below the radicals without the positive and negative sign.
ii) If the valencies have common factors, they are divided by the highest common factor.
iii) The magnitude of valencies should be interchanged and written as subscripts on the right side of the respective ions.
iv) The positive radical followed by the negative radical is written with their charges.
v) If the radicals contain more than one atom, they are enclosed in brackets, and the appropriate valency (more than one) is written as subscripts outside the bracket.

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ii, iii, iv, v, i

iv, i, iii, ii, v

i, ii, iii, iv, v

iv, i, ii, iii, v

answer is B.

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Detailed Solution

For the derivation of the formula the steps followed are:

The positive radical followed by the negative radical is written with their charges.
The valencies of the ions or radicals are written below the radicals without the positive and negative sign.
The valency magnitude is interchanged and written as subscripts.
The valencies are divided by the highest common factor in case valencies have a common factor.
If the radicals contain more than one atom, they are enclosed in brackets, and the appropriate valency (more than one) is written as subscripts outside the bracket.

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