General science

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 (D) CFC

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

Answers:

1. (D)     2. (B)     3. (D)     4. (C)     5. (C)     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)