General Chemistry 1000+ MCQ with answer for JEE Main

1. An essential condition for rusting is
A. high temperature
B. light
C. moisture
D. dry air
Answer : C

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

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

4. The best specimen for drinking purposes is
A. rain water
B. river water
C. conductivity water
D. deep well water
Answer : D

5. Temporary hardness is due to the presence of
A. calcium carbonate
B. calcium bicarbonate
C. magnesium sulphate
D. calcium sulphate
Answer : B

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

7. The malarial parasite was discovered by
A. Sir Ronald Ross
B. Sir Francis Haig
C. Dr Jagadish Chandra Bose
D. Sir CV Raman
Answer : A

8. The carbon cycle ensures that
A. the percentage of carbon dioxide in air is kept almost constant
B. air always contains a constant proportion of oxygen
C. sufficient amounts of carbohydrates are produced
D. the process of photosynthesis proceeds smoothly
Answer : A

9. The term 'nucleons' apples to
A. neutrons
B. protons
C. protons and neutrons
D. protons and electrons
Answer : C

10. An important use of nitrous acid is in
A. the manufacture of explosives
B. the manufacture of dyes
C. refrigerators
D. the preparation of drugs
Answer : B

11. Oxalic acid is used in the manufacture of
A. tincture iodine
B. paints
C. ink
D. aerated water
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. The compound or nitrogen used in dry cells is
A. ammonia
B. ammonium nitrate
C. ammonium chloride
D. ammonium nitrite
Answer : C

14. One of the ingredients of the paste on the side of a match box is
A. phosphorus pentaoxide
B. phosphorus trichloride
C. phosphorus trisulphide
D. phosphorus trioxide
Answer : C

15. 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

16. Rusting of iron cannot be prevented by
A. painting
B. applying alkaline phosphate
C. applying soap water
D. galvanising
Answer : C

17. A mixture of carbon monoxide and hydrogen is
A. coal gas
B. producer gas
C. water gas
D. gobar gas
Answer : C

18. In the common soda-acid fire extinguisher, the fire is put out by
A. acid fumes
B. sodium bicarbonate
C. carbon dioxide
D. sodium carbonate
Answer : C

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

20. Which one of the following is not radioactive?
A. Astatine
B. Francium
C. Tritium
D. Zirconium
Answer : D

21. Cinnabar is an ore of
A. lead
B. zinc
C. mercury
D. chromium
Answer : C

22. Artificial diamonds were produced by
A. Moissan
B. Davy
C. Faraday
D. Marie Curie
Answer : A

23. 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

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

25. Smelling salt contains
A. ammonium chloride
B. ammonium carbonate
C. ammonium sulphate
D. potassium nitrate
Answer : B

26. A form of carbon which is a good lubricant is
A. diamond
B. coke
C. graphite
D. charcoal
Answer : C

27. The substance most abundantly found in sea water is
A. magnesium chloride
B. sodium chloride
C. calcium sulphate
D. potassium chloride
Answer : B

28. Plaster of Paris
A. contracts while setting
B. expands while setting
C. is highly volatile
D. does not suffer any changes in volume while setting
Answer : B

29. Which is the 'odd man' in the following?
A. brass
B. common salt
C. cane sugar
D. water
Answer : A

30. The kinetic energy of gas molecules
A. is unaffected by temperature variations
B. decreases with increase of temperature
C. increases with decrease of temperature
D. increases with increase of temperature
Answer : D

31. Which of the following is a halogen?
A. Radon
B. Astatine
C. Cesium
D. Ruthenium
Answer : B

32. The freezing point of water at 760 mm pressure is
A. 273 K
B. 0 K
C. 273°C
D. -273°C
Answer : A

33. The poisonous nature of carbon monoxide is due to
A. cutting off supply of oxygen
B. it™s being converted into carbon dioxide
C. its combination with haemoglobin of blood
D. its blocking of vocal chords
Answer : C

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

35. Lunar caustic is
A. calcium sulphate
B. ammonium chloride
C. caustic soda
D. silver nitrate
Answer : D

36. Which or the following is not a constituent or gun powder?
A. Ammonium nitrate
B. Nitre
C. Charcoal powder
D. Sulphur
Answer : A

37. An element which is preserved under water is
A. Sodium
B. red phosphorus
C. white phosphorus
D. sulphur
Answer : C

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

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

40. Soda-water contains
A. sodium bicarbonate
B. sodium carbonate
C. carbonic acid
D. sodium hydroxide
Answer : C

41. Annealing of glass is done in
A. a cupel
B. a long narrow chamber
C. an open furnace
D. a closed furnace
Answer : B

42. Brass contains
A. copper and tin
B. aluminium and magnesium
C. copper and zinc
D. copper, tin and zinc
Answer : C

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

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

45. Optical instruments are made of
A. pyrex glass
B. flint glass
C. quartz glass
D. Crooke's glass
Answer : C

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

47. Deficiency of iron causes
A. nervous disorders
B. heart diseases
C. anaemia
D. impairment of vision
Answer : C

48. Proteins are polymerisation products of
A. aldehydes
B. alkenes
C. amino acids
D. alkynes
Answer : C

49. Mild steel contains
A. iron with very low percentage of carbon
B. iron with high percentage of carbon
C. iron and chromium
D. iron and manganese
Answer : A

50. The function of nitrogen in air is
A. to make air a moderate supporter of combustion
B. to maintain the density of air constant
C. to prevent the hydrogen in air from exploding
D. to reduce the poisonous nature of ozone in air
Answer : A