General Chemistry MCQ Solved Paper for LSAT

1. Which of the following carbon compounds is used as a fire extinguisher?
A. Carbon disulphide
B. Chloroform
C. Carbon tetrachloride
D. Methylene chloride
Answer : C

2. A non-metal which is a good conductor of electricity is
A. graphite
B. phosphorus
C. sulphur
D. iodine
Answer : A

3. Which of the following is an essential constituent of acids?
A. Oxygen
B. Nitrogen
C. Hydrogen
D. Chlorine
Answer : C

4. Invert sugar is
A. sucrose
B. glucose
C. fructose
D. a mixture of glucose and fructose
Answer : D

5. PAS is a drug used In the treatment of
A. tuberculosis
B. cancer
C. typhoid
D. malaria
Answer : A

6. Which of the following is not a characteristic of potable water?
A. It must be free from suspended impurities
B. It must be free from harmful bacteria
C. It must contain traces of sodium bicarbonate
D. It must have a fishy odour
Answer : D

7. A metal which is extracted by thermal reduction is
A. nickel
B. aluminium
C. mercury
D. calcium
Answer : C

8. The compounds produced by plants in the process of photosynthesis are
A. carbohydrates
B. proteins
C. salts
D. fats
Answer : A

9. A non-metal which is a good conductor or heat and electricity is
A. iodine
B. sulphur
C. graphite
D. phosphorus
Answer : C

10. Which of the following cannot be used for the preparation of soap?
A. oleic acid
B. acetic acid
C. palmitic acid
D. stearic acid
Answer : B

11. The compound or nitrogen used in dry cells is
A. ammonia
B. ammonium nitrate
C. ammonium chloride
D. ammonium nitrite
Answer : C

12. The number of neutrons in the nucleus of an atom of mass A and atomic number Z is given by
A. A - Z
B. A + Z
C. Z
D. A
Answer : A

13. In photography, the compound or nitrogen used is
A. Potassium nitrate
B. Silver nitrate
C. Ammonium carbonate
D. Ammonium bicarbonate
Answer : B

14. Nitrous oxide used as anaesthetic is usually mixed with
A. ethyl alcohol
B. chloroform
C. oxygen
D. methyl alcohol
Answer : C

15. A hormone which contains iodine is
A. adrenalin
B. glucagon
C. epinephrin
D. thyroxin
Answer : D

16. The most abundant noble gas present in air is
A. neon
B. argon
C. helium
D. krypton
Answer : B

17. Grape sugar is another name for
A. glucose
B. fructose
C. sucrose
D. maltose
Answer : A

18. Which of the following is baking soda?
A. Na2CO3 . 10H2O
B. NaHCO3
C. Na2CO3 . H2O
D. NH4CI
Answer : B

19. The presence of dust particles in air serves
A. as a nucleus to condense water vapour resulting in rain
B. to maintain the average density of air
C. to minimise the inflammatory nature of oxygen
D. to protect the inhabitants of the earth from the effects of ultra violet rays.
Answer : A

20. Which of the following is not a metal?
A. Lithium
B. Helium
C. Sodium
D. Cobalt
Answer : B

21. Ethyl alcohol is
A. a deliquescent substance
B. an efflorescent substance
C. a hygroscopic substance
D. a dehydrating substance
Answer : C

22. An antipyretic is a drug used
A. in the treatment of malaria
B. to relieve sleepiness
C. to induce sleep
D. to lower body temperature
Answer : D

23. In the nitrogen cycle, denitrifying bacteria
A. oxidise ammonia to nitrates
B. convert nitrogen into ammonia
C. oxidise ammonia to free nitrogen
D. oxidise ammonia to oxides of nitrogen
Answer : C

24. The iron salt used in blue prints is
A. ferric sulphate
B. ferric oxalate
C. ferric nitrate
D. ferric chloride
Answer : B

25. The scientist associated with the discovery of the nucleus was
A. Rutherford
B. Moseley
C. Niels Bohr
D. J.J. Thomson
Answer : A

26. Flint glass contains
A. potassium and lead silicates
B. zinc and barium borosilicates
C. potassium and calcium silicates
D. sodium and calcium silicates
Answer : A

27. Iron is rendered passive by
A. conc. H2SO4
B. conc. HCl
C. conc. HNO3
D. acetic acid
Answer : C

28. Glass articles are annealed so that
A. they may appear better
B. they can resist the action of acids and alkalies
C. they lose their brittleness
D. they can withstand temperature shocks
Answer : C

29. Which of the following is a communicable disease caused by viruses?
A. Cholera
B. Dysentery
C. Diabetes
D. Measles
Answer : D

30. Brine is a solution of
A. sodium chloride in water
B. iodine in alcohol
C. sulphur in carbon disulphide
D. Potassium iodide in water
Answer : A

31. During fermentation, the by-product is
A. ethyl alcohol
B. methyl alcohol
C. carbon monoxide
D. carbon dioxide
Answer : D

32. Reduction involves
A. loss of electrons
B. gain of electrons
C. gain of oxygen
D. removal of hydrogen
Answer : B

33. Ozone is an allotrope of Oxygen, containing ______ atom/s of oxygen per molecule instead of two.
A. three
B. four
C. one
D. five
Answer : A

34. White lead is
A. a basic salt
B. an acid salt
C. a double salt
D. a normal salt
Answer : A

35. Which among the following gases present in the air discolours brass nameplates?
A. Hydrogen Sulphide
B. Nitrogen
C. Carbon-di-oxide
D. Oxygen
Answer : C

36. The foul odour of gasoline is due to
A. pyridine
B. hydrogen sulphide
C. cacodyl
D. carbylamines
Answer : B

37. Vulcanisation was discovered by
A. Goodyear
B. Wohler
C. Baeyer
D. Perkin
Answer : A

38. Radium was isolated from
A. galena
B. dolomite
C. sylvine
D. pitchblende
Answer : D

39. A drug that is usually administered for malaria is
A. sulphanilamide
B. quinine
C. methicillin
D. novocaine
Answer : B

40. Which of the following types of water gives lather easily with soap?
A. Hard water
B. Heavy water
C. Soft water
D. Both (a) and (b)
Answer : C

41. The sugar which is used in silvering mirrors is
A. sucrose
B. maltose
C. glucose
D. fructose
Answer : C

42. One method by which the components of air can be separated is
A. shaking with caustic soda solution
B. shaking with water
C. fractional distillation of liquid air
D. passing air over heated magnesium
Answer : C

43. The Long Form of the Periodic Table is based on
A. atomic number
B. valency
C. atomic mass
D. atomic radius
Answer : A

44. The neutron was discovered by
A. Chadwick
B. Madam Curie
C. Becquerel
D. Aston
Answer : A

45. Chloroform used as anaesthetic should be preserved In the dark in tightly stoppered bottles because otherwise
A. it becomes coloured
B. it gets evaporated in air
C. it gets oxidised to phosgene
D. it gets decomposed to chloropicrin
Answer : C

46. Boiler scales' contain
A. calcium carbonate
B. magnesium bicarbonate
C. calcium sulphate
D. magnesium sulphate
Answer : A

47. Argyrol used as eye ointment is a solution of
A. hydrogen peroxide
B. silver nitrate
C. tincture iodine
D. m-cresol
Answer : B

48. High temperature thermometers use
A. sodium amalgam
B. an alloy of sodium and potassium
C. silver amalgam
D. calcium amalgam
Answer : B

49. A substance used both as an explosive and as a germicide is
A. phenol
B. TNT
C. picric acid
D. iodoform
Answer : C

50. Invar, used for making pendulums is an alloy of steel with
A. tungsten
B. nickel
C. manganese
D. chromium
Answer : B