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: