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MCQs

Total Questions : 62 | Page 2 of 7 pages
Question 11. Temporary hardness of water is caused due to the presence of dissolved
  1.    calcium hydrogen carbonates only
  2.    magnesium hydrogen carbonates only
  3.    Sulphates and chlorides of calcium or magnesium
  4.    calcium hydrogen carbonates and magnesium hydrogen carbonates
 Discuss Question
Answer: Option D. -> calcium hydrogen carbonates and magnesium hydrogen carbonates
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 12. Which of the following is an intestinal disease caused by bacteria such as E.coli?
  1.    cholera
  2.    dysentery
  3.    jaundice
  4.    hepatitis
 Discuss Question
Answer: Option A. -> cholera
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 13. Which type of Hepatitis spreads through polluted water?
  1.    hepatitis A only
  2.    hepatitis B only
  3.    hepatitis C
  4.    hepatitis A and B
 Discuss Question
Answer: Option D. -> hepatitis A and B
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 14. Which of the following is the most abundant salt in seawater?
  1.    magnesium chloride
  2.    calcium chloride
  3.    sodium chloride
  4.    sodium nitrate
 Discuss Question
Answer: Option C. -> sodium chloride
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 15. What is the percentage of groundwater?
  1.    0
  2.    0.002
  3.    0.006
  4.    0.021
 Discuss Question
Answer: Option C. -> 0.006
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 16. The hardness that can be removed by boiling is called
  1.    temporary hardness
  2.    permanent hardness
  3.    semi temporary hardness
  4.    semi permanent hardness
 Discuss Question
Answer: Option A. -> temporary hardness
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 17. What is the first step of raw water treatment?
  1.    sedimentation
  2.    coagulation
  3.    filtration
  4.    chlorination
 Discuss Question
Answer: Option A. -> sedimentation
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 18. Property due to which water acts as a universal solvent is its
  1.    polarity only
  2.    ability to make hydrogen bond only
  3.    strong dipole dipole interaction
  4.    polarity and ability to make hydrogen bond
 Discuss Question
Answer: Option D. -> polarity and ability to make hydrogen bond
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 19. Which of the following is a disease in which excess of bile from the liver enters the blood and causes yellowness of skin and eyes?
  1.    cholera
  2.    dysentery
  3.    jaundice
  4.    hepatitis
 Discuss Question
Answer: Option C. -> jaundice
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 20. The fourth step of sewage water treatment is called
  1.    primary sewage treatment
  2.    secondary sewage treatment
  3.    activated sludge treatment
  4.    chlorination
 Discuss Question
Answer: Option D. -> chlorination
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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