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General Science MCQ

General Science MCQ Practice

Practice General Science questions with instant scoring, correct answer highlighting, detailed solutions and first-click AI explanation caching for missing explanations.

📚 Questions: 553 🧭 Page: 7 / 56 🎯 10 per page
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Q. 3913
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When a sound wave goes from one medium to another, the quantity that remains unchanged is:
  • A Frequency
  • B Amplitude
  • C Wavelength
  • D Speed
Correct Option: A  [ Frequency ]
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Q. 3912
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If a liquid is heated in space under no gravity, the transfer of heat will take place by process of:
  • A conduction
  • B convection
  • C radiation
  • D cannot be heated in the absence of gravity
Correct Option: C  [ radiation ]
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Q. 3911
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The sun is seen before the actual sunrise because of:
  • A re?ection
  • B refraction
  • C scattering of light
  • D rectilinear propagation of light
Correct Option: B  [ refraction ]
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Q. 3910
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Hydro?uoric acid is not kept in glass bottles because it reacts with:
  • A visible light
  • B sodium oxide of glass
  • C aluminium oxide of glass
  • D silicon dioxide of glass
Correct Option: D  [ silicon dioxide of glass ]
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Q. 3909
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Sodium stearate is a salt and is used?
  • A in gunpowder
  • B in Paint
  • C to make Soap
  • D to make fertilizer
Correct Option: C  [ to make Soap ]
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Q. 3908
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Which of the following copper alloys is used for the manufacture of springs and suspension filaments in electrical instruments?
  • A Bronze
  • B Aluminium bronze
  • C German silver
  • D Phosphor bronze
Correct Option: D  [ Phosphor bronze ]
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Q. 3907
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What does the airbag, used for safety of car driver, contain?
  • A Sodium bicarbonate
  • B Sodium azide
  • C Sodium nitrite
  • D Sodium peroxide
Correct Option: B  [ Sodium azide ]
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Q. 3906
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Living in the atmosphere of CO is dangerous because it:
  • A Reduces organic matter of tissues
  • B Dries up the blood
  • C Combined with O<sub>2</sub> present inside to form CO<sub>2</sub>
  • D Combines with haemoglobin and makes it incapable of absorbing oxygen
Correct Option: C  [ Combined with O<sub>2</sub> present inside to form CO<sub>2</sub> ]
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Q. 3905
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Domestic cooking gas consists of mostly:
  • A Methane and ethane
  • B Liquifed butane and isobutane
  • C Ethylene and carbon monoxide
  • D Hydrogen and acetylene
Correct Option: A  [ Methane and ethane ]
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Q. 3904
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Helium is preferred to hydrogen in air balloons because it:
  • A is cheaper
  • B is less dense
  • C has greater lifting power
  • D does not form an explosive mixture with air
Correct Option: D  [ does not form an explosive mixture with air ]
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