General Science Objective Questions

1. Which of the following is not an ore of Aluminium?
(A) Felsper
(B) Bauxite
(C) Cryolite
(D) Azurite

2. Most soluble in water is —
(A) Camphor
(B) Sugar
(C) Sulphur
(D) Common Salt

3. Bromine is —
(A) colourless gas insoluble in water
(B) A highly inflammable gas
(C) A Black solid.
(D) A red liquid.

4. The metal used in storage batteries
(A) Iron
(B) Copper
(C) Lead
(D) Zinc

5. Water has maximum density at —
(A) –4°C
(B) 0°C
(C) 4°C
(D) 100°C

6. The chemial name of Uria is —
(A) Aneurin
(B) Chloroetane
(C) Carbamide
(D) None of these

7. Permanent hardness of water can be removed by adding —
(A) Potassium Permanganate
(B) Chlorine
(C) Bleaching Powder
(D) Washing Soda

8. The formula of Plaster of Paris is —
(A) CaSO4
(B) CaSO4, 2H2O
(C) 2CaSO4, 4H2O
(D) 2CaSO4, H2O

9. Which of the following substance is a bad conductor of electricity but a good conductor of heat?
(A) Asbestos
(B) Celluloid
(C) Purspecks
(D) Mica

10. Carborandum is —
(A) Silicon Dioxide
(B) Silicon Carbide
(C) Silicon Nitride
(D) Silicon Phosphide

11. Which of the following is the best conductor of electricity ?
(A) Copper
(B) Mica
(C) Zinc
(D) Silver

12. Washing soda is the common name of —
(A) Calcium Carbonate
(B) Calcium Bi-Carbonate
(C) Sodium Carbonate
(D) Sodium Bi-Carbonate

13. The filament of electric bulb is made of —
(A) Iron
(B) Nichrome
(C) Tungsten
(D) Graphite

14. Bleaching powder is made from —
(A) Sulphur dioxide and gypsum
(B) Chlorine and Charcoal
(C) Soda ash and lime
(D) Lime and Chlorine

15. The two elements that are frequently used for making transistors are —
(A) Boron and Aluminium
(B) Silicon and Germenium
(C) Iridium and Tungsten
(D) Niobium and Columbium

16. Which of the following gas is not known as green house gas ?
(A) Methane
(B) Carbon dioxide
(C) Nitrous oxide

17. Which of the following is not a neutral oxide ?
(A) Carbon Monoxide
(B) Sulphur Dioxide
(C) Water
(D) Nitric Oxide

18. Which of the following is used in making smoke bombs ?
(A) Sulphur
(B) Phosphorus
(C) Hydrogen
(D) Carbon

19. Caustic Soda is —
(A) Nacl
(B) Na2CO3
(C) NaOH
(D) NaHCO3

20. Chemical formula of Water glass is —
(A) Na2SiO3
(B) Al2O3
(C) NaAlO2
(D) CaSiO3

21. Which of the following is not a bleaching agent?
(A) Sulpher di-oxide
(B) Carbon di-oxide
(C) Sodium hypochlorite
(D) Chlorine

22. The gas usually filled in electric bulb is —
(A) Hydrogen
(B) Oxygen
(C) Nitrogen
(D) Carbon di-oxide

23. Heavy water is —
(A) Tritium oxide
(B) Deuterium oxide
(C) Rain water
(D) Water at 4°C

24. The gases used in different types of welding would include —
(A) Oxygen & Hydrogen
(B) Oxygen, acetylene & argon
(C) Oxygen & acetylene
(D) Oxygen, hydrogen & nitrogen

25. Which of the following alloys is used for making magnets ?
(A) Duralumin
(B) Stainless Steel
(C) Alnico
(D) Magnelium

1. (D) 2. (B) 3. (D) 4. (C) 5. (A) 6. (C) 7. (D) 8. (D) 9. (D) 10. (B) 11. (D) 12. (C)
13. (C) 14. (D) 15. (B) 16. (C) 17. (B) 18. (B) 19. (C) 20. (A) 21. (B) 22. (C) 23. (B) 24. (C) 25. (C