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Which of these properties gives a solid its definite shape?

A. Strong intermolecular attraction

B. High melting point

C. High boiling point

D. Weak intermolecular attraction

QUICK ANSWER…

A

DETAILS…

Quite a simple question… strong forces of attraction holding the bonds of solid particles together is chiefly responsible for a solid’s definite form and shape. Weaker intermolecular forces within liquids and gases are responsible for their non-definite shape.

Now for the right answer to the above question:

1. Option A is correct. strong intermolecular attraction, responsible for definiteness in shape.
2. Option B is incorrect. definiteness in shape cannot possibly be caused by high melting point.
3. C is incorrect. definiteness in shape cannot possibly be caused by high boiling point.
4. D is not the correct answer. The opposite should be the case.

QUICK TIPS…

You may please note these/this:

• The weaker the intermolecular forces of attraction between particles of a substance, the more its definite shape will be lost. This is what happens during melting of solids and boiling of liquids.

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/ culled from 2015 JAMB-UTME Chemistry PAST question 28 /