General Science (SET-25)


1. The gases used in different types of welding would include:
a. Oxygen & Hydrogen
b. Oxygen, acetylene & argon
c. Oxygen & acetylene
d. Oxygen, hydrogen & nitrogen

2. Which of the following alloys is used for making magnets?
a. Duralumin
b. Stainless Steel
c. Alnico
d. Magnelium

3.Parmanent hardness of water may be removed by the addition of:
a. Alum
b. Sodium Carbonate
c. Lime
d. Potassium Permanganate

4.Potassium nitrate is used in:
a. Salt
b. Glass
c. Fertiliser
d. Medicine

5.In which type of rocks are metals like Gold and Copper mostly found?
a. Old igneous
b. Old sedimentary
c. Old metamorphic
d. New metamorphic

6.Which of the following gases is lighter than air?
a. Carbon dioxide
b. Oxygen
c. Ammonia
d. Chlorine

7.Which of the following is used as lubricant?
a. Graphite
b. Silica
c. Diamond
d. Iron Oxide

8.The purest form of iron is:
a. Steel
b. Pig iron
c. Cast iron
d. Wrought iron

9.The percentage of carbon is the least in:
a. Grey cast iron
b. Wrought iron
c. White cast iron
d. Steel

10.The colour of Emerald is:
a. Violet
b. Yellow
c. Deep Green
d. Prussian Blue


Answer :

  1. C
  2. C
  3. B
  4. B
  5. A
  6. C
  7. A
  8. D
  9. D
  10. C


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