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Q.

Take an iron nail, a piece of chalk and a rubber band.  Try breaking them by hammering, cutting or stretching.  In which of the above three substances do you think the particles are held together with greater force?

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a

Chalk piece

b

Rubber band

c

All have same strength

d

Iron nail

answer is A.

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Detailed Solution

Iron has more strength as it is solid with strong intermolecular forces.

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