Chalk:

i. Chalk cannot be bent and compressed.

ii. It is rough on the surface.

iii. It is not lustrous and appears dull.

Iron:

i. Iron is a hard material.

ii. It cannot be bent, compressed and scratched.

iii. Its appearance is shiny.

Wood:

i. Wood is a hard material.

ii. It cannot be bent and compressed.

iii. Its appearance is dull

Aluminium:

i. Aluminium is a hard material.

ii. It cannot be bent and compressed.

iii. Its appearance is shiny.

Candle:

i. Candle is a soft material.

ii. It can be bent, compressed and scratched easily.

iii. Its appearance is dull.

Cotton:

i. Candle is a very soft material.

ii. It can be bent, compressed and scratched easily.

iii. Its appearance is dull.