1. Who initially gave the idea of laser?
2. Who is honoured as the Father of Modern Chemistry?
3. Who invented periodic table?
4. Which gas is evolved from paddy fields and marshes?
Methane
Carbon dioxide
Carbon monoxide
Nitrogen
5. Which toxic element is present in automobile exhausts?
Mercury
Nickle
Lead
Potassium
6. Which gases cause acid rain?
Sulphur dioxide, Nitrogen oxides
Carbon dioxide, Carbon monoxide
Methane and Hydrogen
Nitrogen and Carbon monoxide
7. Which metal is used in the making of microchips?
Tin
Silicon
Zinc
Platinum
8. Which chemical is used to make rain coats?
Polystyrene
Bakelite
Poly Vinyl Chloride
Polyethylene terephthalate
9. What is the name given to plastics that cannot be recycled?
Thermosetting plastics
Thermoplastics
Non-recyclable plastics
Red plastics
10. Which element is liquid at ordinary temperature?
Copper
Aluminum
