1000+ General Chemistry MCQ for SSC JHT [Solved]

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

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

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

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

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

6. The simplest hydrocarbon is
A. benzene
B. methane
C. ethane
D. butane
Answer : B

7. 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

8. Tincture iodine is a solution of
A. iodine in potassium iodide
B. iodine in alcohol
C. iodine in water
D. iodine in carbon disulphide
Answer : B

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

10. 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

11. A compound of carbon used as anaesthetic is
A. carbon disulphide
B. carbon tetrachloride
C. phosgene
D. chloroform
Answer : D

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

13. 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

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

15. The human body contains about
A. 50% water
B. 10% water
C. 70% water
D. 20% water
Answer : C

16. LSD is
A. an anaesthetic
B. a psychedelic drug
C. an antipyretic
D. an antibiotic
Answer : B

17. Setting of cement is due to
A. hydration
B. dehydration
C. dialysis
D. osmosis
Answer : A

18. 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

19. Graphite la a good conductor of electricity because
A. it is an allotrope of carbon
B. it gives CO2 on heating
C. it contains free electrons
D. it is oxidised to graphitic acid
Answer : C

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

21. Which or the following electrolysis?
A. Aluminium
B. Copper
C. Zinc
D. Iron
Answer : A

22. The earliest known acid is
A. nitric acid
B. oxalic acid
C. carbonic acid
D. acetic acid
Answer : D

23. Which of the following is used as an illuminant?
A. Gasoline
B. Benzoline
C. Kerosene
D. Petroleum ether
Answer : C

24. Which of the following is not a supporter of combustion?
A. Oxygen
B. Air
C. Hydrogen
D. Chlorine
Answer : C

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

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

27. 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

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

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

31. 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

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 gas evolved when ammonium nitrate is heated is
A. nitrogen
B. nitric oxide
C. nitrogen peroxide
D. nitrous oxide
Answer : D

34. Annealing of glass is carried out by
A. rapid cooling
B. rapid heating
C. slow cooling
D. slow heating
Answer : C

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

36. Physico-chemical characteristics of water in water sources undergo changes due to
A. aquatic macrophytes
B. aquatic fungi
C. effluents
D. evapotranspiration
Answer : A

37. Beri-beri is caused by deficiency of Vitamin
A. A
B. C
C. B12
D. B1
Answer : D

38. Triple Antigen treatment for children is to ward off
A. whooping cough
B. tetanus
C. diphtheria
D. All the three
Answer : D

39. Compounds of nitrogen with metals are called
A. nitrates
B. nitrites
C. hyponitrates
D. nitrides
Answer : D

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

41. The metal which reacts most violently with cold water is
A. calcium
B. sodium
C. magnesium
D. potassium
Answer : D

42. Metals are usually heavy. A light metal is
A. manganese
B. copper
C. potassium
D. plumbum
Answer : C

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

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

45. A light alloy having high tensile strength is
A. German silver
B. solder
C. magnalium
D. bell metal
Answer : C

46. 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

47. 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

48. Calamine is a ore of
A. tine
B. magnesium
C. zinc
D. copper
Answer : C

49. 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

50. The flux added in the blast furnace is
A. Limestone
B. FeO
C. SiO2
D. MgO
Answer : A