WATER A PRECIOUS RESOURCES Question Preview (ID: 52689)


WATER CYCLE AND IMPORTANCE OF WATER. TEACHERS: click here for quick copy question ID numbers.

Which of the following is a way to use water economically?
a) (b) Rainwater harvesting
b) (a) Construction of bawris
c) (d) Infiltration
d) c) Drip irrigation

Which of the following inhibits the seepage of rainwater into ground?
a) (d) A pukka floor
b) (a) Forest land
c) (b) Playground
d) (c) Grass lawn

Which of the following rivers is called the world’s most polluted river?
a) a) Ganga River
b) b) Chenab River
c) (c) Cauvery River
d) (d) Yamuna River

Which of the following are the primary causes of water pollution?
a) (c) Human activities
b) (a) Plants
c) (b) Animals
d) (d) None of these

Which of the following is mainly responsible for the causes of water pollution?
a) (d) Both b and c
b) a) Afforestation
c) (b) Oil refineries
d) (c) Paper factories

Which of the following salts are the main causes of temporary hardness?
a) (d) Magnesium carbonate
b) (a) Calcium sulphate
c) (b) Magnesium sulphate
d) (c) Magnesium chloride

According to the Geological survey, water with less than 1000 ml/litre of total dissolved solids is __________.
a) (b) Freshwater
b) a) Brine water
c) (c) Slightly saline
d) (d) Moderately saline

In most freshwater lakes, the algal productivity is limited by the availability of which of the following inorganic ions?
a) (c) Phosphorus
b) (a) Carbon
c) (b) Nitrogen
d) (d) All of the above

Which of the following is a waterborne disease?
a) (d) All of the above
b) (a) Typhoid
c) (b) Cholera
d) (c) Diarrhoea

What is the health effects of excess fluoride in drinking water?
a) a) Fluorosis
b) (b) Toothaches
c) (c) Lung disease
d) (d) Intestinal infection

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