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Free download in PDF Water Short Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
41
The following cause alkalinity in natural water.
[A]
Potassium carbonate
[B]
Potassium bicarbonate
[C]
Sodium carbonate
[D]
All of the above
42
The following cause alkalinity as well hardness in natural water.
[A]
Calcium carbonate
[B]
Calcium bicarbonate
[C]
Magnesium carbonate
[D]
All of the above
43
Temporary hardness is caused due to
[A]
Magnesium carbonate
[B]
Calcium sulphate
[C]
Magnesium sulphate
[D]
Magnesium chloride
Answer: Magnesium carbonate
44
Permanent hardness is caused due to
[A]
Magnesium carbonate
[B]
Magnesium bicarbonate
[C]
Magnesium sulphate
[D]
All of the above
Answer: Magnesium sulphate
45
According to WHO, the soft water has 0 to _____ milligram per litre as CaCO3.
[A]
30
[B]
60
[C]
90
[D]
120
46
The excess presence of which of the following cause the teeth of children mottled and discoloured?
[A]
Fluorides
[B]
Chlorides
[C]
Hardness
[D]
All of the above
47
Fluorides can be removed by
[A]
Reverse osmosis
[B]
Lime softening
[C]
Ion exchange
[D]
All of the above
48
The source of Arsenic in water is
[A]
Industrial waste
[B]
Fertilizers
[C]
Phosphate rocks
[D]
All of the above
49
The process of nutrient enrichment is termed as
[A]
Eutrophication
[B]
Limiting nutrients
[C]
Enrichment
[D]
Schistosomiasis
50
Freshwater lakes are most often limited by
[A]
Nitrogen
[B]
Phosphorus
[C]
Carbon
[D]
None of the above
51
Which of the following is not a water borne disease?
[A]
Typhoid
[B]
Scabies
[C]
Cholera
[D]
Hepatitis
52
Which of the following is not a water hygiene disease?
[A]
Leprosy
[B]
Conjunctivitis
[C]
Trachoma
[D]
Diarrhoea
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