Question

# Which of the following is NOT an example of an empirical formula?

A
NO2
B
N2O5
C
N2O4
D
N2O3

Solution

## The correct option is D $${ N }_{ 2 }{ O }_{ 4 }$$An empirical formula is the simplest whole-number ratio of all atoms in a molecule.$$i) NO_2 \Rightarrow N:O = 1:2 \Rightarrow \text{Simplest - Empirical}$$$$ii) N_2O_5 \Rightarrow N:O = 2:5 \Rightarrow \text{Simplest - Empirical}$$$$iii) N_2O_4 \Rightarrow N:O = 2:4 \Rightarrow \text{ Not Simple - Molecular}$$$$iv) N_2O_3 \Rightarrow N:O = 2:3 \Rightarrow \text{Simplest - Empirical}$$Hence, option $$C$$ is correct.Chemistry

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