Science - Water - A Precious Resource
Exam Duration: 45 Mins Total Questions : 30
Which of the following is a drinking water source?
- (a)
Sea water
- (b)
Glaciers
- (c)
Ground water
- (d)
Snow
Which of the following causes depletion in the water table of a place?
- (a)
Constructing factories and house
- (b)
Making concrete roads and floors
- (c)
Deforestation
- (d)
All of the above
What is the percentage of water in the human body?
- (a)
80%
- (b)
70%
- (c)
60%
- (d)
50%
What is water?
- (a)
A stable atom
- (b)
A stable element
- (c)
A stable mixture
- (d)
A stable compound
Why does ice float on water?
- (a)
Ice is heavier than water.
- (b)
Ice is cooler than water
- (c)
Ice is lighter than water.
- (d)
Ice is a liquid.
Which of the following is NOT soluble in water?
- (a)
Salt
- (b)
Sugar
- (c)
Oxygen
- (d)
Sand
Why is sea water unfit for use in factories though it is available in plenty
- (a)
It contains bacteria
- (b)
It has foul smell
- (c)
It is heavier than tap water.
- (d)
It has salts which get deposited in the pipelines and boilers
What is water in which 2% or more of salts are dissolved in it called?
- (a)
Distilled water
- (b)
Pure water
- (c)
Saline water
- (d)
Mineral water
What is the percentage of unutilized water due to lack of proper management?
- (a)
5%
- (b)
8%
- (c)
6%
- (d)
10%
Which of these is due to condensation?
- (a)
Drying of wet clothes
- (b)
Water drops appear on cool water bottle
- (c)
Steam rises from wet clothes when they are ironed
- (d)
Black board dries up after wiping it
How is surface water used?
(i) For domestic purpose
(ii) For irrigation purpose
(Hi) For industrial purpose
- (a)
Only (i) and (ii)
- (b)
Only (ii) and (iii)
- (c)
Only (i) and (iii)
- (d)
(i), (ii) and (iii)
Which of the following states of India had a city that faced acute water shortage in the year 1985?
- (a)
Haryana
- (b)
Rajasthan
- (c)
Maharashtra
- (d)
Punjab
Which of the following contaminate water?
- (a)
Fertilisers
- (b)
Pesticides
- (c)
Human waste
- (d)
All of the above
About what percentage of earth's surface is covered with water?
- (a)
30%
- (b)
41%
- (c)
71%
- (d)
89%
What is the source of ground water?
- (a)
Subsoil water
- (b)
Condensation of air trapped in soil
- (c)
Rain water
- (d)
All of the above
Where does rain water, after percolation, get collected?
- (a)
Above the surface of the igneous rocks
- (b)
Above the surface of the impervious rocks
- (c)
Above the surface of the granite rock
- (d)
Above the surface of the basalt rock
What happens to water table if a large area is covered with construction activities?
- (a)
It becomes less
- (b)
It remains constant
- (c)
It becomes more
- (d)
It depends on the
What happens to plants in areas of scanty rainfall ?
- (a)
They grow extensively.
- (b)
They move to other places
- (c)
They wilt and die
- (d)
They have active growth
In which of the following seasons will water consumption by all living beings be more?
- (a)
Winter
- (b)
Autumn
- (c)
Summer
- (d)
Rainy
What happens to ground water when it comes into contact with the interior of the earth?
- (a)
It solidifies to form ice.
- (b)
It absorbs heat and gets converted to steam
- (c)
It is not effected by heat
- (d)
It does not absorb heat
Which of the following, if used regularly. can kill germs in overhead storage tanks in our houses
- (a)
Sand
- (b)
Chlorine tablets
- (c)
Chewable tablets
- (d)
Chalk powder
Why is water called a universal solvent?
- (a)
It can dissolve only solids.
- (b)
It can dissolve only liquid
- (c)
It can dissolve oil
- (d)
It can dissolve 90% of the substances
Which of the following maintains balance of water on the earth?
- (a)
Water table
- (b)
Glaciers
- (c)
Aquifer
- (d)
Water cycle
Two plastic bottles with their bottoms cut are pushed into a trough of water as shown in the figure.
Why is the level of water in bottle 'A' less than the level of water in bottle 'B'?
- (a)
Water occupies space in bottle.
- (b)
Atmospheric pressure in bottle A is more than that of bottle B
- (c)
Water takes the shape of the container.
- (d)
Air occupies space
Which of the following terms is NOT associated with ground water?
- (a)
Water table
- (b)
Infiltration
- (c)
Aquifer
- (d)
Rain water
Which of the following graphs correctly shows the expansion of water at a temperature of 4 C?
- (a)
- (b)
- (c)
- (d)
Why is pure water very difficult to obtain?
- (a)
Water is impure in nature
- (b)
Water cannot exist in pure sta
- (c)
Water is a universal solvent
- (d)
Impurities cannot be filtered from water.
Sohail's teacher asked to identify the correct order of the processes listed below to purify water and make it safe for drinking.
(i) Filtration (ii) Sedimentation (iii) Chlorination (iv) Addition of chemicals
Which of the following is the correct order that Sohail arranged?
- (a)
(i), (iii), (iv), (ii)
- (b)
(iv), (ii), (i), (iii)
- (c)
(ii), (iv), (i), (iii)
- (d)
(iii), (i), (iv), (ii)
Which of these can raise the water table of a place?
- (a)
Rainfall
- (b)
Digging bores
- (c)
Digging wells
- (d)
Sea water
Which of the following is the correct sequence of the water cycle in nature?
- (a)
Evaporation, Precipitation, Condensation
- (b)
Precipitation, Condensation, Evaporation.
- (c)
Evaporation, Condensation, Precipitation.
- (d)
Condensation, Evaporation, Precipitation