SPSC Lecturer of chemistry past papers Solved 

SPSC Lecturer of chemistry past papers Solved 

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1. The reason for chlorinating water is

a) To propagate germs

b) To add taste

c) To add minerals

d) To kill germs

2. Cooling of vapors of some compounds changes them directly into solid-state. This phenomenon is called

a) Sublimation

b) Evaporation

c) Condensation

d) Crystallization

3. The carbonated drink is an example of

a) Gas in gas

b) Gas in water

c) Gas in solid

d) Solid in liquid

4. Smoke is a solution to

a) Solid in solid

b) Solid in gas

c) Solid in liquid

d) Gas in gas

5. Fog is a solution to

a) Gas in gas

b) Gas in liquid

c) Liquid in gas

d) Liquid in liquid

6. The common battery used in automobiles is

a) Iron storage battery

b)Copper storage battery

c)Lead storage battery

d) silver storage battery

7. which acid is present in sour milk

a) citric acid

b) tartaric acid

c) lactic acid

d) formic acid

8. The water that can produce good lather with soap is known as

a) soft water

b) hard water

c) heavy water

d) atomic water

9. Which of the following is the purest form of  carbon

a) diamond

b) graphite

c) buckyballs

d) marble

10. The glitter of the diamond is

a) because it is transparent

b) because it is non-conductor

c)  due to its quality of reflecting light

d) because it is its density

11. In colorful diamond  different colors are present due to

a) impurities

b) angular bonds between carbon atoms

c) different patterns of the carbon chain

d) none

12. All of the following are different uses od hydrogen peroxide except

a) used as bleaching agents

b) used to deodar sewers

c) used as fuel in space

d) used to prepare organic peroxide

13. Ozone is present in which of the following layers of the atmosphere

a) troposphere and thermosphere

b) troposphere and stratosphere

c) mesosphere

d) thermosphere

14. Methane is used in daily life with the name of

a) Carbon dioxide

b) Natural gas

c) Carbon mono oxide

d) None

15. When electricity is passed through neon it glows

a) Blue

b) Green

c) Red

d) Yellow

16. Argon and which gas is used in various type of fluorescent and photo lubes

a) Oxygen

b) Helium

c) Neon

d) krypton

17. Enzymes are

a) chemical catalyst

b) biological catalyst

c) organic catalyst

d) inorganic catalyst

18. The atomic weight of uranium

a) 237

b) 238

c) 226

d) 242

19. Which among the following is in the liquid  state in room temperature

a) Mercury

b) Sodium

c) Phosphorous

d) None

20. Which of the following gases is used in cigarette lighters

a) Butane

b) Methane

c) Propane

d) Radon

21. LPG  consist of

a) Butane and propane

b) Ethane and hexane

c) Ethane and nonane

d) None

22. Which of the following is fire resistant

a) Asbestos

b) Gypsum

c) Dolomite

d) None

23. Which of the following is used for silvering of mirrors

a) silver nitrate

b) zinc nitrate

c) silver oxide

d) none

24. Raw materials used for manufacturing of glass

a) sand /soda /limestone

b) sand/charcoal/soda

c) limestone/charcoal/Sulphur

d) AB

25. Solder is an alloy of

a) Tin and lead

b) Tin and zinc

c) Zinc and copper

d) Zinc & lead

26. Why does milk curdle

a) Fermentation of lactose

b) Reaction of microbes

c) Overheating

d) Fungus growth

27. Which of the following is  the lightest gas

a) Nitrogen

b) Hydrogen

c) Ammonia

d) Carbon dioxide

28. Which one of the following does not wet the walls of the glass vessels in which it is kept

a) Water

b) Alcohol

c) Mercury

d) none

29. Dialysis is used for people with defective the kidneys it involves the process of

a) adsorption

b) osmoses

c) diffusion

d) electro freesias

30. The substances coated with  plastic tape

a) zinc oxide

b) iron oxide

c) manganese oxide

d) iron sulfate

31. which form of phosphorus is used in safety match

a) red phosphorus

b) white phosphorus

c) yellow phosphorus

d) black phosphorus

32. The permanent hardness of water can be removed by adding

a) potassium permanganate

b) chlorine

c) bleaching powder

d) washing soda

33. The first synthetic fiber made by men

a) rayon

b) nylon

c) polestar

d) terrycoll

34. Gypsum is added to cement clinker  to

a) increase the tensile strength of cement

b) Bind the particles of calcium silicate

c) Decrease the rate of setting of cement

d) None

35. Production of (CFC) chlorofluorocarbons is used in which Of the following domestic products

a) Television

b) Tube light

c) Cooking gas

d) refregater

36. In fireworks, the green flame is produced because

a) Mercury

b) Sodium

c) Potassium

d) barium

37. The mixture of two material is called

a) Desperation

b) Alloy

c) Mouse

d) Hard drive

38. Dynamite discovers by

a) Daimler

b) Mosley

c) Natural gas

d) Alford Nobel

e) Freud

39. Which of the following gas is used for fire extinguishers

a) Oxygen

b) Hydrogen

c) Water vapor

d) Carbon dioxide

40. Stains of rust from iron on cloth can be removed by

a) Hydrogen peroxide

b) Alcohol

c) Oxalic acid

d) petrol

41. cooking gas is a mixture of following two gasses

a) Methane and carbon dioxide

b) Oxygen

c) Nitrogen

d) Oxygen and methane

42. Addition of salt to the water, its

a) Boiling point increase

b) Boiling point decrease

c) Boiling point not effect

d) freezing point increase

43. Which of the following gas not pollute the air

a) Carbon dioxide

b) Nitrogen dioxide

c) Carbon monoxide

d) Sulfur dioxide

44. The inorganic natural resource of the earth is

a) Minerals fuels

b) Wood

c) Coal

d) Microbes

45. Which one of the highest value of fule

a) Hydrogen

b) Charcoal

c) Natural gas

d) Gasoline

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