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The correction factor 'a' to the ideal gas equation corresponds to:

1. Density of the gas molecules
2. Volume of the gas molecules
3. Forces of attraction between the gas molecules
4. Electric field present between the gas molecules

Correct answer: Forces of attraction between the gas molecules

Solution

The correction factor 'a' in the van der Waals equation accounts for the intermolecular forces of attraction between gas molecules, which are neglected in the ideal gas equation.

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