1. What is laughing gas?
[a] Carbon dioxide
[b] Sulphur dioxide
[c] Nitrous oxide
[d] Hydrogen peroxide

2. The release of which one of the following into ponds and wells helps in controlling mosquitoes?
[a] Crab
[b] Gambusia Fish
[c] Snail
[d] Dogfish

3. Which one of the following is a vector of Kala-Azar disease?
[a] House Fly
[b] Aedes Mosquito
[c] Sand Fly
[d] Anopheles Mosquito

4. Which one of the following element is essential for the transmission of nerve impulses in nerve fibres?
[a] Calcium
[b] Sodium
[c] Zinc
[d] Iron

5. In the human body, the red blood cells are produced in
[a] Liver
[b] Muscles
[c] pancreas
[d] Bone Marrow

6. Which one of the following is biodegradable?
[a] DDT     
[b] Paper
[c] Plastic 
[d] Aluminium

7. Centre for DNA fingerprinting in India is located at
[a] Pune
[b] Hyderabad
[c] Mumbai
[d] Udaipur

8. In elephants which teeth grow into tuskers?
[a] Incisors of the lower jaw
[b] Incisors of the upper jaw
[c] Canines of the lower jaw
[d] Canines of the upper jaw

9. Which one of the following system of the body is attacked by HIV?
[a] Reproductive
[b] Immune
[c] Digestive
[d] Nervous

10. The branch of science dealing with the improvement of the human race is
[a] Ecology
[b] eugenics
[c] Euphenics
[d] Zoology

11. Water-gas is a mixture of
[a] Carbon Dioxide & Water
[b] Carbon Monoxide & Hydrogen
[c] Carbon Dioxide & Hydrogen
[d] Carbon Monoxide & Nitrogen

12. Which of the following is Glauber’s Salt?
[a] Na₂CO₃.10H₂O
[b] Na₂SO₄.10H₂O
[c] K₂CO₃.10H₂O
[d] K₂SO₄.1OH₂O

13. The metal present in Chlorophyll is
[a] Zinc
[b] Iron
[c] Magnesium
[d] Manganese

14. The acid which is called “Aqua Fortis” is
[a] Sulphuric Acid
[b] Phosphoric Acid
[c] Carbonic Acid
[d] Nitric Acid

15. The compound which is known as Inorganic Benzene is
[a] Borazole
[b] Diborane
[c] Borax
[d] Boron Carbide

16. The metal used in high-temperature thermometry is
[a] Mercury
[b] Galium
[c] Germanium
[d] Copper

17. An antiknock agent among the following is
[a] Tetrahydrofuran
[b] DDT
[c] Tetraethyl lead
[d] TNT

18. Which of the following is known as the Universal solvent?
[a] Water
[b] Benzene
[c] Sulphuric Acid
[d] Nitric Acid

19. Cinnabar is the ore of
[a] Lead
[b] Zinc
[c] Copper
[d] Mercury

20. Contact Process and Lead Chamber Process are used in the manufacture of
[a] Nitric Acid
[b] Ammonia
[c] Sulphuric Acid
[d] Sodium Carbonate