Question

Which of the following is not equal to 1 mole of substance?

Answer 1

Answer : The one mole atom of carbon is not equal to 1 mole of substance.

Explanation :

As we know that,

$6.02\times 10^{23}$ number of hydrogen molecules present in 1 mole of substance.

and,

At STP, 22.4 L volume of hydrogen gas present in 1 mole of substance

and,

$6.02\times 10^{23}$ number of sodium molecules present in 1 mole of substance.

and,

$6.02\times 10^{23}$ number of gold molecules present in 1 mole of substance.

All these options are equal to the 1 mole of substance.

While the option, one mole atom of carbon  is not equal to the 1 mole of substance because 1 mole of atom of carbon is equal to 12 grams.

Hence, the one mole atom of carbon is not equal to 1 mole of substance.