Which of the following statements about molecular and empirical formulas is\ are false?
I. A given compound can have the same, molecular and empirical formula.
II. The molecular formula is a whole number multiple of the empirical formula.
III. $H_{2} O_{2}$ represents the empirical formula of hydrogen peroxide.

III only

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I and II only

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II and III only

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I, II an III

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I only

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Solution

The correct option is A III only
Option $A$ is the correct answer.
Only the 3rd statement is wrong. The emperical formula of Hydrogen peroxide is not $H_{2} O_{2}$ but is $H O$ . This is because, each molecule of $H_{2} O_{2}$ has Hydrogen and Oxygen in the ratio of $1 : 1$

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Similar questions

Q. Which one could represent the empirical formula and the molecular formula of a given compound?

Give examples of compounds whose
(a) empirical formula is the same as the molecular formula.
(b) empirical formula is different from the molecular formula.

Q. The molecular formula of a compound is a simple multiple of its empirical formula.

Q. What is empirical formula give an example ? For a compound whose empirical formula and molecular formula are same, give an example.

State whether the given statement is true or false:

A compound of relative molecular mass

34

and empirical formula

H O

has the molecular formula

H_{2} O_{2}

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The correct option is A III onlyOption A is the correct answer.Only the 3rd statement is wrong. The emperical formula of Hydrogen peroxide is not H2O2 but is HO. This is because, each molecule of H2O2 has Hydrogen and Oxygen in the ratio of 1:1

The correct option is A III only
Option $A$ is the correct answer.
Only the 3rd statement is wrong. The emperical formula of Hydrogen peroxide is not $H_{2} O_{2}$ but is $H O$ . This is because, each molecule of $H_{2} O_{2}$ has Hydrogen and Oxygen in the ratio of $1 : 1$