Chemistry 3

 

1. Which of the following is a major constituent of petrol?

     (a) Pentane
     (b) Octane
     (c) Methane
     (d) Hexane

2. Which of the following is a widely used solid lubricant?

     (a) Graphite
     (b) Sodium
     (c) Lithium
     (d) Zinc

3. The commonly used washing soda is

     (a) Sodium Bicarbonate
     (b) Sodium Carbonate
     (c) Sodium Chloride
     (d) Magnesium Chloride

4. Which one of the following gases is mainly responsible for the GREEN HOUSE EFFECT?

     (a) Sulphur dioxide
     (b) Carbon monoxide
     (c) Hydrogen sulphide
     (d) Carbon dioxide

5. An electro-magnet is made of

     (a) Soft iron
     (b) Copper
     (c) Hard Steel
     (d) Zinc

6. Only two elements are in liquid state at room temperature. They are

     (a) Bromine, Iodine
     (b) Hafnium, Mercury
     (c) Bromine, Mercury
     (d) None of these

7. Rh factor is related to-

     (a) Blood Transfusion
     (b) Atmospheric Pressure
     (c) Blood Pressure
     (d) Space

8. The most electro negative element in the following is-

     (a) I
     (b) Br
     (c) Cl
     (d) F

9. NaCl is the chemical formula of-

     (a) Urea
     (b) Salt
     (c) Baking soda
     (d) Lime

10. Which of the following materials is used for permanent magnets?

     (a) Brass
     (b) Copper
     (c) Steel
     (d) Soft steel

11. Which one of the following minerals occurs abundantly in the Earth’s crust?

     (a) Bauxite
     (b) Silica
     (c) Manganese
     (d) Iron

12. Which one of the following is present in the largest amount in terms of percent by mass in the earth’s crust?

     (a) Silicon
     (b) Oxygen
     (c) Carbon
     (d) Calcium

13. Which of the following is called Aurum?

     (a) Bronze
     (b) Gold
     (c) Silver
     (d) Copper

14. Which of the following is not required for Photosynthesis?

     (a) Oxygen
     (b) Sunlight
     (c) Carbon dioxide
     (d) water

15. ______ acid is present in vinegar.

     (a) Bromic
     (b) Acetic
     (c) Chloric
     (d) Nitric

 

Answer: (1) b (2) a (3) b (4) d (5) a (6) c (7) a (8) d (9) b (10) d (11) b (12) a (13) b (14) a (15) b