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MCQs

Total Questions : 619 | Page 57 of 62 pages
Question 561. What makes sea water not to be safe for drinking ?
  1.    High salt concentration
  2.    High minerals
  3.    Marine water pollution
  4.    Density of saewater
 Discuss Question
Answer: Option A. -> High salt concentration
Answer: (a).High salt concentration
Question 562. What is an approximate percentage of dissolved solid in seawater?
  1.    0.045
  2.    0.035
  3.    0.045
  4.    0.025
 Discuss Question
Answer: Option B. -> 0.035
Answer: (b).0.035
Question 563. Which three elements constitute 90% of sea water?
  1.    Cl, Na, Mg
  2.    S, Ca, K
  3.    Cl, S, Si
  4.    C, K, O
 Discuss Question
Answer: Option A. -> Cl, Na, Mg
Answer: (a).Cl, Na, Mg
Question 564. 'Water' has a high
  1.    Dipolic movement
  2.    Tripolic Movement
  3.    No dipolic movement
  4.    No tripolic movement
 Discuss Question
Answer: Option A. -> Dipolic movement
Answer: (a).Dipolic movement
Question 565. Which water can be consumed by humans?
  1.    Ocean water
  2.    Sea water
  3.    Fresh water
  4.    Marine water
 Discuss Question
Answer: Option C. -> Fresh water
Answer: (c).Fresh water
Question 566. How much water is contained by hydrosphere?
  1.    1660 million cubic km
  2.    1560 million cubic km
  3.    1460 million cubic km
  4.    1360 million cubic km
 Discuss Question
Answer: Option D. -> 1360 million cubic km
Answer: (d).1360 million cubic km
Question 567. What is chemical formula of water?
  1.    H₂SO₄
  2.    H₂O
  3.    H₂S
  4.    H₂
 Discuss Question
Answer: Option B. -> H₂O
Answer: (b).H₂O
Question 568. What is melting point of water?
  1.    6 C
  2.    0 C
  3.    9 C
  4.    10 C
 Discuss Question
Answer: Option B. -> 0 C
Answer: (b).0 C
Question 569. Which cation is dominating in seawater?
  1.    K
  2.    Ca
  3.    Na
  4.    Mg
 Discuss Question
Answer: Option B. -> Ca
Answer: (b).Ca
Question 570. Which is most rigid part of earth layer ?
  1.    Triosphere
  2.    Mesophere
  3.    Stratosphere
  4.    Lithosphere
 Discuss Question
Answer: Option D. -> Lithosphere
Answer: (d).Lithosphere

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