NDA - General Chemistry 1000+ MCQ [Solved] PDF Download

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

2. Methylated spirit is a mixture of
A. methyl alcohol and acetic acid
B. methyl alcohol and ethyl alcohol
C. ethyl alcohol and pyridine
D. methyl alcohol and pyridine
Answer : B

3. A mixture of naphthalene and sand is separated by
A. evaporation
B. using a magnet
C. sublimation
D. sedimentation
Answer : C

4. The chemical name of aspirin is
A. acetamide phenol
B. malonyl urea
C. aminosalicylic acid
D. acetyl salicylic acid
Answer : D

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

6. White vitriol is
A. ZnSO4 . 7H2O
B. FeSO4 . 7H2O
C. MgSO4 . 7H2O
D. CaSO4 . 2H2O
Answer : A

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

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

9. A burning substance which continues to burn in a jar of carbon dioxide is
A. zinc
B. red phosphorus
C. magnesium
D. sulphur
Answer : C

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

11. Dust particles in the air of large industrial cities are removed by
A. Sedimentation
B. Electrophoresis
C. Tyndall effect
D. Brownian movement
Answer : B

12. The oldest known organic compound is
A. urea
B. methane
C. acetic acid
D. benzene
Answer : C

13. Water always contains hydrogen and oxygen in the ratio 1:8 by weight. This is in accordance with the
A. Law of Multiple Proportions
B. Law of Definite Proportions
C. Law of Conservation of Mass
D. Law of Reciprocal Proportions
Answer : B

14. Coke is a substance obtained
A. from coal mines
B. when wood is burnt in excess of air
C. by heating coal out of contact with air
D. by heating wood out to contact with air
Answer : C

15. Washing soda is
A. sodium hydroxide
B. sodium carbonate
C. sodium bicarbonate
D. potassium chloride
Answer : B

16. Even as early as 3000 BC glass was known to the
A. Europeans
B. Egyptians
C. Asians
D. Americans
Answer : B

17. Which one of the following metals is used to extract another metal?
A. Lead
B. Tin
C. Zinc
D. Aluminium
Answer : D

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

19. 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

20. Which of the following can absorb gases quickly?
A. Activated charcoal
B. Anthracite coal
C. Diamond
D. Graphite
Answer : A

21. Hard water does not lather well with soap because
A. it contains carbonates of calcium and magnesium
B. it contains sodium chloride
C. it is highly coloured
D. it contains suspended impurities
Answer : A

22. Diamonds are weighed in
A. grams
B. pounds
C. carats
D. tons
Answer : C

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

24. The main constituent of gobar gas is
A. methane
B. nitrogen
C. carbondioxide
D. ethylene
Answer : A

25. 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

26. Which of the following statements regarding natural radioactivity is true?
A. It is spontaneous disintegration of atoms
B. It is induced by bombardment with projectiles
C. It is transmutation of atoms with projectiles
D. It is dependent on temperature
Answer : A

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

28. The raw materials required for the manufacture of glass are
A. silica, sodium nitrate and soda ash
B. silica, limestone and sodium nitrate
C. silica, sodium oxide and limestone
D. silica, soda ash and limestone
Answer : D

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

30. Which or the following gases is soluble in water and Is collected by the downward displacement or air?
A. Carbon dioxide
B. Sulphur dioxide
C. Ammonia
D. Hydrogen
Answer : C

31. Plastics are synthetic
A. rubbers
B. fibres
C. resins
D. sugars
Answer : C

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

33. The raw materials used in the manufacture of cement are
A. brimstone and silica
B. limestone and clay
C. brimstone and clay
D. brimstone and limestone
Answer : B

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

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

36. The modern system of symbols was evolved by
A. Dalton
B. Cavendish
C. Avogadro
D. Berzelius
Answer : D

37. The Combined Gas Law equation is
A. P1V1T1 = P2 V2 T2
B. P1V1T2 = P2V2T1
C. P = P1 + P2 + P3
D. C =
Answer : B

38. Which one of the following gases is extremely soluble in water?
A. Carbon dioxide
B. Ammonia
C. Chlorine
D. Hydrogen sulphide
Answer : B

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

40. Leakage in Liquefied Petroleum Gas (LPG) cylinders is easily detected by adding
A. mercaptans
B. propylene
C. carbon disulphide
D. phosgene
Answer : A

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

42. Which of the following metals is the best conductor of heat and electricity?
A. Aluminium
B. Silver
C. Copper
D. Magnesium
Answer : B

43. Which of the following act a both u oxidising and reducing agent?
A. nitric acid
B. ammonia
C. nitrous acid
D. nitrogen peroxide
Answer : C

44. An example of thermo setting plastics is
A. bakelite
B. polythene
C. PVC
D. Teflon
Answer : A

45. 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

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

47. Consider the following statements: Hard water is not suitable for
1) drinking
2) washing clothes with soap
3) use in boilers
4) irrigating crops
Which of these statements are correct?
A. 1 and 3
B. 2 and 3
C. 1, 2 and 4
D. 1, 2, 3 and 4
Answer : D

48. Which of the following elements is not required for the healthy growth of plants?
A. Nitrogen
B. Phosphorus
C. Potassium
D. Mercury
Answer : D

49. Acute diabetes patients smell of
A. acetone
B. ether
C. ethyl alcohol
D. methyl alcohol
Answer : A

50. The formula for cane sugar is
A. C6H12O6
B. C2H5OH
C. C12H22O11
D. C7H8O
Answer : C