Olympiad Science - Water
Exam Duration: 45 Mins Total Questions : 30
Which of the following are changed when water boils?
(i) Temperature
(ii) State
(iii) Colour
- (a)
Only (i) and (ii)
- (b)
Only (ii) and (Hi)
- (c)
Only (i) and (iii)
- (d)
(i), (H)and (iii)
Clouds are formed due to
- (a)
only evaporation.
- (b)
only condensation.
- (c)
both evaporation and condensation.
- (d)
only vapourisation.
In a small town, the number of water pumps, concrete houses and roads increased. What happens to the water table of that place?
- (a)
It becomes lower
- (b)
It becomes higher
- (c)
It remains unaffected
- (d)
It first becomes lower and then higher.
Cloud seeding is a technique that induces rain. What does the process involve?
- (a)
Adopting an agricultural practice that depends on clouds
- (b)
Introducing particles in clouds to facilitate condensation
- (c)
Making clouds and placing them in the sky
- (d)
Scattering clouds to form seed likes tructures
Given in the figure are four containers that contain the same amount of water.
In which of the following containers will water evaporate the slowest?
- (a)
Q
- (b)
R
- (c)
P
- (d)
S
Which of the following is the primary source of water on land?
- (a)
Lakes
- (b)
Tanks
- (c)
Ponds
- (d)
Rain water
Why is water useful to life on the earth?
(i) It maintains ecological balance.
(ii) It sustains life.
(iii) It is necessary for respiration in aquatic organisms.
- (a)
Only (i) and (ii)
- (b)
Only (ii)and (iii)
- (c)
Only (i) and (iii)
- (d)
(i), (ii) and (iii)
Observe the figure given below and identify the process.
- (a)
Water cycle
- (b)
Torrential rain causing floods
- (c)
Soil erosion
- (d)
Rain water harvesting
Why do you feel cool after you start sweating?
- (a)
Evaporation of water droplets
- (b)
Condensation of water droplets
- (c)
Freezing of water droplets
- (d)
Solidification of salts in the water droplets
What causes the formation of salt from sea water?
- (a)
Evaporation
- (b)
Condensation
- (c)
Transpiration
- (d)
Transformation
Which of the following will be an advantage of inter-linking rivers in India?
- (a)
Lot of people will gain employment.
- (b)
Floods will take place uniformly throughout the country.
- (c)
Water will be distributed uniformly.
- (d)
India will become a technically advanced country.
What is rain water harvesting?
- (a)
Storing ground water present in wells.
- (b)
Stopping the cultivation of crops to save water
- (c)
The seeping of water into the ground
- (d)
Collecting rainwater and storing it for future use
Temporary hardness of water is due to the presence of
- (a)
calcium bicarbonate.
- (b)
sodium carbonate.
- (c)
potassium carbonate.
- (d)
magnesium hydride.
Which of these occurs due to condensation?
- (a)
The drying of wet clothes.
- (b)
Water drops appearing on the outer side of a cool water bottle.
- (c)
Steam rising from wet clothes when they are ironed.
- (d)
Black board gets dried after it is wiped with wet cloth.
Aquatic animals and plants
- (a)
have special organs that store oxygen.
- (b)
have to come out of water to breathe.
- (c)
use the oxygen dissolved in water for respiration.
- (d)
use oxygen present in the air.
Which of the following substances contain water?
(i) Milk
(ii) Blood
(iii) Oil
(iv) Fruits
- (a)
Only (i), (ii) and (iv)
- (b)
Only (i), (ii) and (iii)
- (c)
Only (ii), (iii) and (iv)
- (d)
Only (i), (iii) and (iv)
Which of the following combines with water vapour or rain water to form acid rain?
- (a)
Dust
- (b)
Carbon particles
- (c)
Oxygen
- (d)
Sulphur dioxide
Which of these constituents present in air leads to the formation of fog and mist?
- (a)
Nitrogen
- (b)
Oxygen
- (c)
Water vapour
- (d)
Carbon dioxide
The process of collecting rain water in huge, cemented pits is called
- (a)
storing of water.
- (b)
filtration of water.
- (c)
transportation of water.
- (d)
rain water harvesting.
Why is mineral water better than distilled water for drinking?
- (a)
Mineral water is cheap.
- (b)
Mineral water is easily available.
- (c)
Mineral water contains dissolved salts
- (d)
Mineral water is colorful.
Which of the following causes water to change from one state to another?
- (a)
Pressure
- (b)
Concentration
- (c)
Temperature
- (d)
Volume
Water purification is done to make water fit for use. Which of these can help in purification of water?
- (a)
distillation
- (b)
reverse osmosis
- (c)
boiling
- (d)
all of these
Parul wants to know what can happen if it does not rain for a long period of time
- (a)
The soil will lose water and become dry
- (b)
The soil will lose water and become dry
- (c)
Ground water level will drop
- (d)
All of these
Parts of India face flood situations during monsoon season. The floods can
- (a)
submerge crops and villages
- (b)
cause extensive damage to life and property
- (c)
affect aquatic animals too
- (d)
all of these
A thick fog envelopes Delhi in winter mornings. This is because of
- (a)
condensation of water vapour near the ground.
- (b)
evaporation of water
- (c)
transpiration of water
- (d)
all of these.
Which one of the following does not have water?
- (a)
meat
- (b)
onion
- (c)
apple
- (d)
none of these
The atmosphere has a lot of water in gaseous state. This is because of
- (a)
evaporation.
- (b)
transpiration.
- (c)
both 'a' and 'b'.
- (d)
condensation.
Vidhi took out a bottle of water from the refrigerator and left it on the table. After ten minutes she found a puddle of water around it.
What had happened?
- (a)
The bottle was leaking
- (b)
The bottle was broken and should be thrown away
- (c)
Both 'a' and 'b'.
- (d)
Condensation occurred.
Vidhi took out a bottle of water from the refrigerator and left it on the table. After ten minutes she found a puddle of water around it.
Why did this happen?
- (a)
There was breaking of the plastic bottle when it was being cooled in the refrigerator.
- (b)
The breaking resulted in leakage of water on to the table
- (c)
Both 'a' and 'b'.
- (d)
Water vapour condensed on the cool bottle.
It is a cold winter day. Atharva has to dry his school uniform for the next day.
How will this drying process help?
- (a)
Application of heat on the cloth will increase the temperature of the wet cloth.
- (b)
The heat energy supplied to the wet cloth will increase the temperature of water present in the cloth
- (c)
Heat will lead to evaporation of water into vapour.
- (d)
all of these.