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SCIENCE FUNDAMENTALS MCQs

General Science Mixed, Science, Fundamentals Vectors

Total Questions : 736 | Page 9 of 74 pages
Question 81. Noise or Noise pollution measured in:
  1.    Phon
  2.    Deci
  3.    Decibel
  4.    Decimal
 Discuss Question
Answer: Option C. -> Decibel
Question 82. Which layer protects earth from harmful rays of the Sun?
  1.    Ionosphere
  2.    Ozone layer
  3.    Troposphere
  4.    Magnetosphere
 Discuss Question
Answer: Option B. -> Ozone layer
Question 83. Which is the absolute temperature scale?
  1.    Celsius
  2.    Fahrenheit
  3.    Kelvin
  4.    All of these
 Discuss Question
Answer: Option C. -> Kelvin
Question 84. What are metal bearing rocks called?
  1.    Bitumen
  2.    Bauxite
  3.    Metalloids
  4.    Ores
 Discuss Question
Answer: Option D. -> Ores
Question 85. The percentage of oxygen present in air is approximately-
  1.    44%
  2.    23%
  3.    40%
  4.    21%
 Discuss Question
Answer: Option D. -> 21%
Question 86. Newton is the unit of:
  1.    Force
  2.    Momentum
  3.    Acceleration due to gravity
  4.    Velocity
 Discuss Question
Answer: Option A. -> Force
Question 87. Decibel is the unit used for:
  1.    Speed of light
  2.    Intensity of heat
  3.    Intensity of sound
  4.    Radio wave frequency
 Discuss Question
Answer: Option C. -> Intensity of sound
Question 88. Which of the following is not an isotope of hydrogen?
  1.    Tritium
  2.    Deuterium
  3.    Protium
  4.    Yttrium
 Discuss Question
Answer: Option D. -> Yttrium
Answer: (d).Yttrium
Question 89. The main constituents of pearls are
  1.    calcium oxide and ammonium chloride
  2.    calcium carbonate and magnesium carbonate
  3.    aragonite and conchiolin
  4.    ammonium sulphate and sodium carbonate
 Discuss Question
Answer: Option B. -> calcium carbonate and magnesium carbonate
Answer: (b).calcium carbonate and magnesium carbonate
Question 90. Amalgams are
  1.    highly coloured alloys
  2.    alloys which contain mercury as one of the contents
  3.    alloys which have great resistance to abrasion
  4.    alloys which contain carbon
 Discuss Question
Answer: Option B. -> alloys which contain mercury as one of the contents
Answer: (b).alloys which contain mercury as one of the contents

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