Trick to Remember cross multiplication Formula

Method of cross multiplication

Discussion OF ex-3.4,|| Cross-multiplication method || Short method to remembering cross-multiplication method by Determinant || Example-14,15

Trick to Remember Asian Countries!!

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Deduce the molecular formulae of the compound obtained from the following pairs of elements by the cross multiplication method. Fe (Valency 2) and S (Valency 2)

Deduce the molecular formulae of the compound obtained from the following pairs of elements by the cross multiplication method. Ca (Valency 2) and O (Valency 2)

Deduce the molecular formulae of the compound obtained from the following pairs of elements by the cross multiplication method. H (Valency 1) and O (Valency 2)

Deduce the molecular formulae of the compound obtained from the following pairs of elements by the cross multiplication method. N (Valency 3) and H (Valency 1)

Deduce the molecular formulae of the compound obtained from the following pairs of elements by the cross multiplication method. C (Valency 4) and Cl (Valency 1)

Deduce the molecular formulae of the compound obtained from the following pairs of elements by the cross multiplication method. C (Valency 4) and ) O (Valency 2)