Saturday, June 16, 2012

MCQs - Science & Technology - Harayana Board Middle School/ NTSE (SAT) Quiz-9/CBSE Class 8

Science & Technology Objective Test -2008 (Haryana Board)/ 
NTSE Sample Quiz-9 (Science) /Class 8 Science
(Good for Class 9 and Class 10  students to brush up their knowledge)
(Total MCQs = 65                                                                                                                              Duration: 1 Hour)



Q1. Some bodies looking like stars, which do not twinkle, are called
(A) Planet
(B) Satellite
(C) Artificial Satellite
(D) Meteorite




Q2. The name of star nearest to Earth is
(A) Comet
(B) North Star
(C) Moon
(D) Alpha Centauri


Q3. Our ancestors imagined some figures in such star groups and gave them specific names
(A) Constellation
(B) Seven stars
(C) Small seven stars
(D) Figure stars


Q4. Before getting the telescope available, which planet was seen with naked eye
(A) Uranus
(B) Venus
(C) Neptune
(D) Pluto

Q5. Earth rotates around sun
(A) In 365 days
(B) In 366 days
(C) In 365.25 days
(D) None of these

Q6. Uranus was discovered by
(A) T. W. Taumbow
(B) William Herschel
(C) Halley
(D) U. J. Leverrier

Q7. There is a big gap between Mars and Jupiter. There are many small bodies in this gap, which rotate around the sun, are called
(A) Meteorite
(B) Comet
(C) Planetoids
(D) Celestial body

Q8. After how many years Halley’s Comet appears
(A) 66 years
(B) 76 years
(C) 72 years
(D) 70 years

Q9. The speed of artificial satellites is adjusted in such a way that they could complete one circle of
Earth
(A) In 24 hrs
(B) In 365 days
(C) In 365½ days
(D) In 23 hrs

Q10. The time taken by light to reach from Sun to Earth is
(A) 8 Minutes
(B) 490 Seconds
(C) 8½ Minutes
(D) 500 Seconds

Q11. For the formation of soil is necessary
(A) Air and water
(B) Micro-particles of rocks
(C) Humus
(D) None of these

Q12. Which produce acid by living on rocks
(A) Lichen
(B) Protozoa
(C) Micro-organism
(D) All of these

Q13. The soil, consisting of particles having radius from 0.005 mm to 0.05 mm, is
(A) Clay soil
(B) Mud
(C) Sand
(D) Concrete

Q14. The pH value of alkaline soil is
(A) 6
(B) 7
(C) More than 7
(D) None of these

Q15. To grow Xerophytic plants, is suitable
(A) Mishroh
(B) Alluvial
(C) Glacial
(D) Sand

Q16. To save soil from erosion is called
(A) Soil formation
(B) Soil erosion
(C) Soil preservation
(D) Soil pollution

Q17. Air is a
(A) Mixture
(B) Element
(C) Compound
(D) None of these

Q18. Unit of pressure is
(A) Newton
(B) Pascal
(C) Kilogram wt.
(D) Litre

Q19. The formula of Potassium Chlorate is
(A) KCl
(B) KClO2
(C) KClO3
(D) KCLO

Q20. Which gas is filled in packet-packed snacks like potato chips
(A) Oxygen
(B) Neon
(C) Carbon dioxide
(D) Nitrogen

Q21. There are nodules in the roots of some plants, found in them are
(A) Nitrogen fixation bacteria
(B) Denitrifying bacteria
(C) Ammoniating bacteria
(D) None of these

Q22. Which destroy ozone layer
(A) SPM
(B) CFCs
(C) CO2
(D) NO2

Q23. The cause of Lung Cancer may be
(A) Cobalt
(B) Nickel
(C) Arsenic
(D) Lead

Q24. The cause of gradual warming of Earth’s atmosphere is
(A) Environmental pollution
(B) Eruption of volcano
(C) Green House effect
(D) Changing of season

Q25. The layer of air, nearest to the surface of Earth, is called
(A) Troposphere
(B) Stratosphere
(C) Ionosphere
(D) None of these

Q26. Corrosion is
(A) Copper oxide
(B) Lead oxide
(C) Zinc oxide
(D) Ferric oxide

Q27. The chemical name of marble tile is
(A) Calcium carbonate
(B) Calcium bicarbonate
(C) Magnesium carbonate
(D) Sodium carbonate

Q28. Some compounds are only chain of Hydrogen and Carbon, they are called
(A) Hydrogen sulphide
(B) Hydrocarbon
(C) Hydroxyl group
(D) None of these

Q29. The temperature, at which liquid starts boiling, is called
(A) Freezing point
(B) Melting point
(C) Boiling point
(D) None of these

Q30. The melting point of Naphthalene is
(A) 90°C
(B) 70°C
(C) 96°C
(D) 80°C

Q31. The formula of Hydrochloric acid is
(A) HCl
(B) H2SO4
(C) HNO3
(D) NaCl

Q32. To bring down ice temperature to –9°C is used
(A) Potassium nitrate
(B) Potassium nitride
(C) Potassium chlorate
(D) Ammonium nitrate

Q33. The formula of Methane is
(A) C2H6
(B) CH4
(C) C2H2
(D) CO2

Q34. Acid present in lemon is
(A) Citric acid
(B) Picric acid
(C) Carbonic acid
(D) Hydrochloric acid


Q35. The micro-particle of any element or compound, which is of free existence, is called
(A) Atom
(B) Particle
(C) Molecule
(D) Proton

Q36. Name the scientist who discovered electron.
(A) John Dalton
(B) J. J. Thomson
(C) Rutherford
(D) James Chadwick

Q37. Which scientist discovered neutron
(A) John Dalton
(B) Rutherford
(C) J. J. Thomson
(D) James Chadwick

Q38. The sum of the protons and neutrons, present in the nucleus of any atom, is called
(A) Mass number
(B) Atomic number
(C) Valency
(D) None of these

Q39. The indicator of atomic number of any element is
(A) Z
(B) A
(C) X
(D) E


Q40. Atomic number of sodium is 11 and number of neutrons is 12, then atomic mass will be
(A) 22
(B) 11
(C) 23
(D) 12

Q41. Which original particle of atom contains negative charge
(A) On proton
(B) On neutron
(C) On electron
(D) On nucleus


Q42. The formula of common salt is
(A) KCl
(B) NACL
(C) KClO3
(D) NaCl


Q43. Tritium is isotope of which atom
(A) Of Oxygen
(B) Of Hydrogen
(C) Of Nitrogen
(D) Of Carbon

Q44. The science, which is used to obtain metal from ore and purify them for various uses, is called
(A) Metal filth
(B) Metal-work/metallurgy
(C) Metallography
(D) Process

Q45. Iron-pillar of Delhi was made approx in A.D.
(A) 360–365
(B) 365–370
(C) 370–375
(D) 375–380

Q46. The property of metals to be pulled as wire is called
(A) Hardness
(B) Conductivity
(C) Ductility
(D) Malleability

Q47. Which of the following is non-metal?
(A) Diamond
(B) Brass
(C) Nickel
(D) Gold

Q48. The metal found in liquid form at normal temperature is
(A) Mercury
(B) Sodium
(C) Silver
(D) Bromine

Q49. In which solution gold is soluble
(A) In acids
(B) In alkalies
(C) In silver nitrate
(D) In Aqua-regia

Q50. In water purification plant which is used to kill bacteria
(A) Salt
(B) Chlorine
(C) Insecticide medicines
(D) Potassium permanganate

Q51. The mixture of any metal with other metal or non-metal is called
(A) Improved metal
(B) Alloy
(C) Non-metal
(D) Sub-metal

Q52. Whose alloy is used in ship-building
(A) Aluminium
(B) Copper
(C) Zinc
(D) Iron

Q53. The plating of chromium and nickel on Iron with the help of electricity is called
(A) Yashad plating
(B) Metallisation
(C) Electroplating
(D) None of these

Q54. The hardest non-metal in nature is
(A) Diamond
(B) Graphite
(C) Coke
(D) Sulphur

Q55. In how many allotropes is carbon mainly found
(A) One
(B) Two
(C) Three
(D) Four


Q56. In which of the following mines of Madhya Pradesh diamond is found
(A) Vajrakaroor
(B) Panna
(C) Golkunda
(D) None of these


Q57. Which of the following are fullerines?
(A) C60
(B) C70
(C) C90
(D) All of these

Q58. Which gas is used by plants in photosynthesis
(A) Carbon dioxide
(B) Oxygen
(C) Nitrogen
(D) Sunlight

Q59. The chemical formula of marble stone is
(A) Na2CO3
(B) CaCO3
(C) NaHCO3
(D) Ca(OH)2

Q60. Fire-extinguishing devices are used to put off fire, while using this which gas comes out
(A) Oxygen
(B) Carbon monoxide
(C) Carbon dioxide
(D) Nitrogen

Q61. Which scientist discovered safety lamp for the safety of miners
(A) Sir Humphrey Davy
(B) Archimedes
(C) Niels Bohr
(D) Newton

Q62. The material used to obtain white crystals in production of sugar is
(A) Wooden coke
(B) Bone coke
(C) Hard coke
(D) Animal coke

Q63. The structural formula of methane is
(A) CH4
(B) C – H4
(C)

       











(D)










Q64. The name of Hydrocarbon having three carbon is
(A) Methane
(B) Ethane
(C) Butane
(D) Propane

Q65. What is the full form of L.P.G.
(A) Compressed Natural Gas
(B) Liquified Petroleum Gas
(C) Marsh Gas
(D) Tear Gas



Answers:
1. (A) Planet
2. (D) Alpha Centauri
3. (A) Constellation
4. (B) Venus
5. (C) In 365.25 days
6. (B) William Herschel
7. (C) Planetoids
8. (B) 76 years
9. (D) In 23 hrs
10. (C) 8½ Minutes
11. (C) Humus 
12. (D) All of these
13. (A) Clay soil
14. (C) More than 7
15. (D) Sand
16. (C) Soil preservation
17. (A) Mixture
18. (B) Pascal
19. (C) KClO3
20. (D) Nitrogen
21. (A) Nitrogen fixation bacteria
22. (B) CFCs
23. (B) Nickel (Nickel is associated with lung cancer. While Arsenic causes cancer of bladder, kidney, intestine etc.)
24. (C) Green House effect
25. (A) Troposphere
26. (D) Ferric oxide
27. (A) Calcium carbonate
28. (B) Hydrocarbon
29. (C) Boiling point
30. (D) 80°C
31. (A) HCl
32. (D) Ammonium nitrate (used in instant cold packs)
33. (B) CH4
34. (A) Citric acid
35. (A) Atom
36. (B) J. J. Thomson
37. (D) James Chadwick
38. (A) Mass number
39. (A) Z
40. (C) 23
41. (C) On electron
42. (D) NaCl
43. (B) Of Hydrogen

44. (B) metallurgy
45. (D) 375–380
46. (C) Ductility
47 (A) Diamond
48 (A) Mercury
49 (D) In Aqua-regia
50 (B) Chlorine
51 (B) Alloy
52. (A) Aluminium
53. (C) Electroplating
54. (A) Diamond
55. (D) Four (Diamond, Graphite, Amorphous Carbon, Fullerenes)
56. (B) Panna

57. (D) All of these
58. (A) Carbon dioxide
59. (B) CaCO3
60. (C) Carbon dioxide
61. (A) Sir Humphrey Davy 
62. (B) Bone coke (??? It used to be bone char, animal/cow bones).
63. (C)
64. (D) Propane
65. (B) Liquified Petroleum Gas

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