1000+ General Science MCQ for JEE Main [Solved]

1. The major ingredient of leather is
A. Nucleic acid
B. Carbohydrate
C. Collagen
D. Polymer
Answer : C

2. In a certain electronic circuit the output is positive if input 1 is positive and input 2 is zero. If both inputs are positive the output is zero. This is
A. an AND circuit
B. an OR circuit
C. a high-pass filter
D. a NOR circuit
Answer : B

3. Water has maximum density at
A. 0°C
B. -4°C
C. 100°C
D. 4°C
Answer : D

4. Epoxy resins is used as
A. Adhesives
B. Detergents
C. Insecticides
D. Moth repellants
Answer : A

5. The element present in the largest amount in rocks and minerals is
A. Carbon
B. Hydrogen
C. Aluminium
D. Silicon
Answer : D

6. Old-written material, which cannot be read easily can be read by
A. None of these
B. Ultraviolet rays
C. Infra Red rays
D. Cosmic Rays
Answer : A

7. The accumulation of stress along the boundaries of lithospheric plates results in which of the following?
A. Earthquakes
B. Magnetic reversals
C. Hurricanses
D. Increased deposition of deep-sea sediments
Answer : A

8. Earth's seasons are caused by which of the following?
A. The varying amount of sunspot activity
B. The tilt of the earth's rotation relative to the ecliptic as earth revolves around the sun
C. The earth's orbit around the sun as an exlipse rather than a circle
D. The rotation of during a 24-hour day
Answer : B

9. Polythene is industrially prepared by the polymerisation of
A. styrene
B. methane
C. ethylene
D. acetylene
Answer : C

10. Which of the following elements is obtained from sea weeds ?
A. Argon
B. Vanadium
C. Iodine
D. Sulphur
Answer : C

11. The metal that is present in Photo Films is
A. Silver
B. Magnesium
C. Platinium
D. Mercury
Answer : A

12. The formula of Plaster of Paris is
A. 2CaSO4, H2O
B. CaSO4
C. CaSO4, 2H2O
D. 2CaSO4, 4H2O
Answer : A

13. The location and energy of an electron in an atom can be specified by
A. Atomic number
B. Atomic mass
C. Quantum numbers
D. None of these
Answer : C

14. Carbon tetrachloride fire extinguisher should not be used in closed room because it produces poisonous glass called
A. Carbon Monoxide
B. Phosgene
C. Phosphine
D. None of these
Answer : D

15. The marine animal called dugong which is vulnerable to extinction is a/an
A. Amphibian
B. Shark
C. Bony fish
D. Mammal
Answer : D

16. The colour of Emerald is
A. Deep Green
B. Violet
C. Prussian Blue
D. Yellow
Answer : A

17. What is the unit for measuring the pitch or frequency of sound ?
A. Coulomb
B. Hum
C. Cycles
D. Decible
Answer : D

18. The fastest acting enzyme in the biological kingdom is
A. amylase
B. lipase
C. carboxypeptidase
D. carbonic anhydrase
Answer : D

19. The hardest substance available on earth is
A. Platinum
B. Quartz
C. gold
D. Diamond
Answer : D

20. The chemial name of Uria is
A. Carbamide
B. Chloroetane
C. Aneurin
D. None of these
Answer : A

21. Rust is
A. A mixture of FeO and Fe(OH)2
B. A mixture of Fe2O3 and Fe(OH)2
C. A mixture of Fe2O3, 3H2O and FeO
D. FeO only
Answer : C

22. Which of the following elements is a metal
A. S
B. Ga
C. Se
D. I
Answer : B

23. The speed of light with the rise in the temperature of the medium
A. Increases
B. Remains unaltered
C. Drops sharply
D. Decreases
Answer : B

24. According to Daltons atomic theory the smallest particle which can exist independently is
A. An atom
B. A cation
C. A molecule
D. An anion
Answer : A

25. Which of the following items will be attracted to the north pole of a permanent magnet by a magnet force?
A. A piece of iron that is not a permanent magnet
B. The north pole of another prmanent magnet
C. A positively charged glass rod
D. A negatively charged rubber rod
Answer : A

26. The smallest functional and structural unit of kidney is called as
A. Granulocyte
B. Neuron
C. Reticulocyte
D. Nephron
Answer : D

27. The Panda belongs to the same family as that of
A. Cat
B. Bear
C. Rabbit
D. Dog
Answer : B

28. The most important ore of Aluminium is
A. Calamine
B. Calcite
C. Galena
D. Bauxite
Answer : D

29. Which of the following is most likely to cause a rise in the average temperature of earth's atmosphere in future?
A. Atomic warfare
B. Depletion of earth's ozone layer
C. CO2 from fossil fuels
D. Dust clouds from valcanoes
Answer : C

30. The property of a substance to absorb moisture from the air on exposure is called
A. Desiccation
B. Efflorescence
C. Deliquescene
D. Osmosis
Answer : C

31. Liquefied Petroleum gas (LPG) consists of mainly
A. Methane, Butane and Propane
B. Methane, Ethane and Hexane
C. Ethane, Hexane and Nonane
D. Methane, Hexane and Nonane
Answer : A

32. Brass gets discoloured in air due to the presence of which gas in air
A. Carbon dioxide
B. Hydrogen Sulphide
C. Oxygen
D. Nitrogen
Answer : B

33. Quartz crystals normally used in quartz clocks etc. is chemically
A. A mixture of B and C
B. Silicon dioxide
C. Germenium dioxide
D. Sodium Silicate
Answer : B

34. Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of
A. Sulphonates
B. Zeolites
C. Nitrates
D. None of these
Answer : B

35. The solar eclipse occurs when
A. the sun comes in between the moon and the earth
B. the moon comes in between the sun and the earth
C. the earth comes in the between the sun and the moon
D. None of the above
Answer : B

36. The metallic constituents of hard water are
A. Calcium, magnesium and iron
B. Magnesium, Calcium and tin
C. Magnesium, tin and iron
D. Iron, tin and calcium
Answer : A

37. Which of the following elements is non-radioactive?
A. Uranium
B. Plutonium
C. Thorium
D. Zirconium
Answer : D

38. Which of the following parts of the sun is easily visible only during a total solar eclipse?
A. core
B. photosphere
C. sunspots
D. corona
Answer : D

39. Nitrification means
A. Conversion of nitrogen to nitric acid.
B. Production of nitrogen from air
C. Convert the atmospheric nitrogen to effective nitrogen compound.
D. Liquifaction of nitrogen
Answer : C

40. Which of the following is commonly called a polyamide ?
A. Orion
B. Terylene
C. Rayon
D. Nylon
Answer : D

41. The metal used in storage batteries
A. Zinc
B. Iron
C. Copper
D. Lead
Answer : D

42. Which of the following is in liquid form at room temperature ?
A. Sodium
B. Cerium
C. Francium
D. Lithium
Answer : C

43. Apparatus invented by Archimedes is :
A. Pulley
B. Microscope
C. Thermemoter
D. Barometer
Answer : A

44. The intencity of Earthquakes is measured on
A. Beaufort scale
B. Secant scale
C. Mercalli scale
D. Richter scale
Answer : D

45. When a gas is turned into a liquid, the process is called
A. evaporation
B. condensation
C. sublimation
D. deposition
Answer : B

46. The type of glass used in making prisms and lenses is
A. Pyrex glass
B. Soft glass
C. Flint glass
D. Jena glass
Answer : C

47. The recent atomic weight scale is based on
A. 1H1
B. 1H2
C. 6C12
D. 8O16
Answer : C

48. One fathom is equal to
A. 6 feet
B. 6 metres
C. 60 cms
D. 60 feet
Answer : A

49. Permanent hardness of water can be removed by adding
A. Potassium Permanganate
B. Bleaching Powder
C. Chlorine
D. Washing Soda
Answer : D

50. In an atomic nucleus, neutrons and protons are held together by
A. Magnetic forces
B. Gravitational forces
C. Coulombic forces
D. Exchange forces
D