Is all lustrous materials are metals?

Observing appearance and colour of some materials: Generally metals are lustrous.Do all lustrous materials are metals?

Statement (i) : Glass, water and air are all transparent materials. Statement (ii) : Saw dust is soluble in water.

Observing appearance and colour of some materials: We all know that mirror is lustrous. Can a mirror be called metal?

Mostly all polymeric materials are non-bio degradable and as such the discarded plastic materials made out of these polymers reate environmental pollution. The chief among the polluting plastic material is polythene. The use of polythene bags, popularly called carry bags and their discardance in the environment is a singular nuisance for municipal cleaning department Non-biodegradable polymer is/are

Distinguish between lustrous and non-lustrous materials.

What is lustrous?

Now observe carefully all the materials that you have listed above as metals and non metals Can you group materials into two categories by looking at their properties ?

Do all materials burn?

You came to know that the Diamond is a hardest material and it is a non metal and similarly. Mercury is a soft material and it is a metal. Write down the questions raised in your mind.

Dumping of waste material made up of metals and non metals leads to environment pollution. Do you support the statement? Give your justification with suitable examples.