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MCQs

Total Questions : 68 | Page 7 of 7 pages
Question 61. The area not considered under the crust is ____________
  1.    Mountainous area
  2.    Continental area
  3.    Oceanic area
  4.    Glacial area
 Discuss Question
Answer: Option D. -> Glacial area
Answer: (d).Glacial area
Question 62. The depth up to which the mantle is said to exist is ________
  1.    2000 km
  2.    1500 km
  3.    2900 km
  4.    1800 km
 Discuss Question
Answer: Option C. -> 2900 km
Answer: (c).2900 km
Question 63. The thickness of the 2 layers of the upper mantle is approximately said to be ________
  1.    400 and 600 km
  2.    300 and 500 km
  3.    450 and 800 km
  4.    300 and 400 km
 Discuss Question
Answer: Option A. -> 400 and 600 km
Answer: (a).400 and 600 km
Question 64. Limestone is not easily soluble in pure water but carbonated water dissolves the rock effectively.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 65. The rock-mineral insoluble in water is ____________
  1.    Rock salt
  2.    Gypsum
  3.    Calcite
  4.    Pyrite
 Discuss Question
Answer: Option D. -> Pyrite
Answer: (d).Pyrite
Question 66. 2KaISi₃O₈ + 2H₂O + CO₂ → Al₂Si₂O₅(OH)₄ + K₂CO₃ + 4SiO₂
Orthoclase + Carbonic acid → ___________ + Pot. Carbonate + Silica
Identify the mineral in the blank space of the equation.
  1.    Illite
  2.    Kaolinite
  3.    Montmorillonite
  4.    Halloysite
 Discuss Question
Answer: Option B. -> Kaolinite
Answer: (b).Kaolinite
Question 67. Which of the following is reduction?
  1.    Removal of hydrogen
  2.    Removal of electron
  3.    Removal of oxygen
  4.    Addition of oxygen
 Discuss Question
Answer: Option C. -> Removal of oxygen
Answer: (c).Removal of oxygen
Question 68. Minerals like Orthoclase and Felspar undergo which method of chemical decomposition?
  1.    Hydration
  2.    Hydrolysis
  3.    Oxidation
  4.    Reduction
 Discuss Question
Answer: Option B. -> Hydrolysis
Answer: (b).Hydrolysis

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