1000+ General Chemistry MCQ for ESIC [Solved]

1. The commonest ore of aluminium is
A. cryolite
B. bauxite
C. malachite
D. azurite
Answer : B

2. If people sleep in closed rooms where charcoal fire is burning, they die due to
A. carbon monoxide
B. carbon dioxide
C. methane
D. phosgene
Answer : A

3. The alloy which is extremely hard and resistant to acids is
A. chrome steel
B. silicon steel
C. stainless steel
D. invar
Answer : B

4. Which among the following is a metalloid?
A. Tin
B. Silver
C. Iodine
D. Arsenic
Answer : D

5. 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

6. Dry Ice is
A. solid carbon dioxide
B. liquid oxygen
C. liquid hydrogen
D. liquid. Chlorine
Answer : A

7. Jeweller's rouge is
A. magnetic oxide of iron
B. ferric oxide
C. ferrous oxide
D. ferrous carbonate
Answer : B

8. Two or more entirely different compounds having the same molecular formula are known as
A. isobars
B. isotopes
C. isomorphs
D. isomers
Answer : D

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

10. Which of the following is not a physical change?
A. Distillation of water
B. Action of heat on potassium chlorate
C. Powdering of glass
D. Burning of an electric lamp
Answer : B

11. In the making of jewels, gold is usually mixed with
A. zinc
B. tin
C. copper
D. aluminium
Answer : C

12. Alum is used
A. as an analgesic
B. in the purification of water
C. as a fertilizer
D. as a disinfectant
Answer : B

13. Iodine in alcohol is known as
A. quick lime
B. tincture iodine
C. rectified spirit
D. None of these
Answer : B

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

15. 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

16. Quick lime has the formula
A. CaO
B. Ca(OH)2
C. NaOH
D. Na2CO3
Answer : A

17. Galvanising is the process of coating
A. iron with zinc
B. zinc with iron
C. copper with silver
D. silver with gold
Answer : A

18. Tincture iodine is
A. a disinfectant
B. an analgesic
C. a hypnotic
D. a dye
Answer : A

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

20. Isotopes differ in the number of
A. Protons
B. Neutrons
C. Electrons
D. Protons and electrons
Answer : B

21. Penicillin was discovered by
A. Alexander Fleming
B. Sir JJ Thomson
C. Dr Nessler
D. Sir John Russel
Answer : A

22. The ore of iron is
A. Dolomite
B. Magnetite
C. Bauxite
D. Anglesite
Answer : B

23. A mixture of ethyl alcohol and water can be separated by
A. evaporation
B. sublimation
C. using a separating funnel
D. fractional distillation
Answer : D

24. Real gases tend to become ideal Under
A. low pressure and high temperature
B. low pressure and low temperature
C. high pressure and low temperature
D. high pressure and high temperature
Answer : A

25. Which of the following cannot be used as fuel?
A. Gasoline
B. Kerosene
C. Sulphuric acid
D. Alcohol
Answer : C

26. A compound used both as a fungicide and as a disinfectant is
A. chlorine
B. carbon monoxide
C. sulphur dioxide
D. o-cresol
Answer : C

27. Rayon la made from
A. cotton
B. wool
C. cellulose
D. silk
Answer : C

28. Which one of the following is used in dry cleaning of garments?
A. asphalt
B. naphtha
C. diesel oil
D. lubricating oil
Answer : B

29. The soaps used in shaving cream are
A. calcium soaps
B. lead soaps
C. soft soaps
D. hard soaps
Answer : C

30. Galvanised iron sheets are protected from rusting due to the presence of a layer of
A. lead
B. chromium
C. zinc
D. tin
Answer : C

31. The vitamin that is found in citrus fruits such as lemon and orange is
A. vitamin C
B. vitamin B2
C. vitamin A
D. vitamin E
Answer : A

32. Iron is coated with zinc to prevent rusting. The process is called
A. annealing
B. tempering
C. calcining
D. galvanising
Answer : D

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

34. Which of the following is not a chemical change?
A. Rusting of iron
B. Burning of magnesium
C. Sublimation of iodine
D. Electrolysis of water
Answer : C

35. The most abundant constituent in air is
A. hydrogen
B. nitrogen
C. oxygen
D. noble gases
Answer : B

36. The principle involved in dialysis, a treatment administered to patients with affected kidneys is
A. Cataphoresis
B. Osmosis
C. Dehydration
D. Diffusion
Answer : B

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

38. BHC is a
A. Rodenticide
B. Herbicide
C. Pesticide
D. Fungicide
Answer : C

39. The gas which has a faint sweet odour is
A. nitrogen
B. nitrous oxide
C. nitric oxide
D. nitrogen peroxide
Answer : B

40. Which among the following is a solid non-metal?
A. chlorine
B. mercury
C. water
D. iodine
Answer : D

41. 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

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

43. The artificial silk produced from cellulose is
A. Polyethylene
B. Nylon
C. Terylene
D. Rayon
Answer : D

44. Clark's method for removal of temporary hardness in water uses
A. calcium hydroxide
B. washing soda
C. calcium chloride
D. zeolite
Answer : A

45. The addition of a neutron to the nucleus of an atom
A. increases the atomic mass of the atom
B. decreases the atomic mass of the atom
C. increases the charge on the nucleus
D. decreases the charge on the nucleus
Answer : A

46. The substance preserved under water is
A. potassium
B. sodium
C. red phosphorus
D. white phosphorus
Answer : D

47. Which of the following is used in fuel to propel rockets?
A. Petrol
B. Kerosene
C. Hydrazine
D. Alcohol
Answer : C

48. Which one of the following is used for dry cleaning?
A. Kerosene oil
B. Diesel oil
C. Lubricating oil
D. Petroleum ether
Answer : D

49. CAN is used as (Calcium Ammonium Nitrate)
A. an explosive
B. a fertilizer
C. a dye
D. a bleaching agent
Answer : B

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