500 Best Environmental Engineering- MCQ

Q49). The presence of ………. causes red colour in water

a).Iron
b).Manganese
c).Sodium fluoride
d).Calcium carbonate

Correct Answer:
Iron
Explanation:



Q50). When lead is present in water, it

a).Changes its colour
b).Causes turbidity
c).Causes alkalinity
d).None of these

Correct Answer:
None of these
Explanation:



Q49). The presence of ………. causes red colour in water

a).Iron
b).Manganese
c).Sodium fluoride
d).Calcium carbonate

Correct Answer:
Iron
Explanation:



Q50). When lead is present in water, it

a).Changes its colour
b).Causes turbidity
c).Causes alkalinity
d).None of these

Correct Answer:
None of these
Explanation:



Q51). The presence of hydrogen sulphide in water causes

a).Softening
b).Alkalinity
c).Acidity
d).Bad taste

Correct Answer:
Acidity
Explanation:



Q52). Turbidity of water is expressed in terms of

a).Silica scale
b).Platinum cobalt scale
c).pH value
d).none of the above

Correct Answer:
Silica scale
Explanation:



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