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Which of the following has the strongest intermolecular forces of attraction?

Which of the following has the strongest intermolecular forces of attraction? Correct Answer Iron ball

The boiling points of water, hydrogen, ethane and iron ball are 100°C, -89°C, -1°C and 2750°C respectively. Higher the intermolecular forces between the molecules of the substance, higher will be its boiling point. Thus, iron ball has the strongest intermolecular forces of attraction.

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