Chemistry 7 (Previous Years Asked SSC Questions)

 1.  Which one of the following is found in kidney stones?

     (a) Sodium oxalate
     (b) Calcium oxalate
     (c) Sodium chloride
     (d) Calcium acetate

2. The chemical name of laughing gas is

     (a) Nitric oxide
     (b) Nitrogen dioxide
     (c) Nitrogen pentoxide
     (d) Nitrous oxide

3. Tear gas used by the police to disperse the mob contains

     (a) Carbon dioxide
     (b) Chlorine
     (c) Ammonia
     (d) Hydrogen sulphide

4. Which one of the following minerals is found in pure form?

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

5. Epsom salt is used

     (a) as purgative
     (b) in softening water
     (c) in paper industry
     (d) in making tooth paste

6. Major gaseous pollutant of the thermal power station is

     (a) H₂S
     (b) NH₃
     (c) NO₂
     (d) SO₂

7. Bone ash contains

     (a) Calcium sulphate
     (b) Phosphoric sulphate
     (c) Calcium phosphate
     (d) Calcium hypophosphate

8. The process of removing calcium and magnesium from hard water is known as

     (a) Sedimentation
     (b) Filtration
     (c) Flocculation
     (d) Water softening

9. Which metal does not undergo corrosion due to the formation of oxide layer?

     (a) Copper
     (b) Iron
     (c) Aluminium
     (d) Zinc

10. The National Chemical Laboratory (India) is located in

     (a) Mumbai
     (b) Bangaluru
     (c) Hyderabad
     (d) Pune

11. Helium gas is filled in balloons because

     (a) its atomic number is 2
     (b) it is lighter than air
     (c) it is one of the constituents of water
     (d) it is a noble gas

12. Name two elements that find wide application in transistor industry

     (a) Silicon and Germanium
     (b) Carbon and Platinum
     (c) Iridium and Germanium
     (d) Tungsten and Platnium

13. Which one of the following is used for dating very old objects of archaeological importance?

     (a) Phosphorus
     (b) Tritium
     (c) Radium
     (d) Carbon

14. In upper layer of atmosphere ozone is formed

     (a) the action of ultraviolet rays on oxygen
     (b) the combination of oxygen molecules
     (c) subjecting oxygen to high pressure
     (d) the action of nitrogen on oxygen in atmosphere

15. Submarines move under water. They have engines that run on

     (a) Petrol and oxygen
     (b) Diesel
     (c) Batteries
     (d) Steam

 

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