Is it true that a lump of salt, a broken glass piece, a pen, an iron nail, glass marbles, a naphthalene ball, a piece of sugar candy are all examples of hard materials and green grass, a small thermocol box, and hair are all examples of soft materials?

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True

False

answer is A.

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Detailed Solution

The above statement is True.
The materials that can be compressed by hand or bent into different shapes and can be scratched or cut easily are said to be soft. Green grass, a small thermocol box and hairs are soft materials. Materials that cannot be compressed by hand or are deformed and cannot be scratched easily are said to be hard. A lump of salt, broken glass pieces, pens, iron nails, glass marbles, naphthalene balls and a piece of sugar candy are hard materials.

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