Assertion :The simplest types of chemical formulas are called empirical formulae. Reason: Empirical formula uses letters and numbers indicating the numerical proportions of atoms of each type.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
An empirical formula giving the proportions of the elements present in a compound but not the actual numbers or arrangement of atoms, the empirical formula of a chemical compound is the simplest positive integer ratio of atoms present in a compound.

For example, Empirical formula of benzene is CH whereas its molecular formula is C $_{6}$ H $_{6}$

Thus, both assertion and reason are correct and the reason is the correct explanation.

Hence, the correct option is $A$

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