Water Test

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Water Test - 6

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Weekly Quiz Competition

Question 1

1 / -0

Observe the flow chart and identify P, Q, R and S.

	P	Q	R	S
(1)	Ocean	Canal	River	Swimming Pool
(2)	River	Water Park	Canal	Sea
(3)	Ocean	River	Canal	Well
(4)	Ocean	Swimming Pool	River	Well

(1)

(2)

(3)

(4)

Solution

River and ocean are naturally occurring water bodies, and canal and well are man made.
Hence, option (3) is correct.

Question 2
1 / -0

Which of the following are the forms of surface water?

(i) Streams
(ii) River water
(iii) Lakes
(iv) Springs

A
(i) and (ii)

B
(ii) and (iii)

C
(i), (ii) and (iv)

D
(i), (ii) and (iii)

Solution

Streams, rivers and lakes are forms of surface water and are fed mainly by the precipitation in the form of rain or snow.
Springs are formed where the groundwater emerges to the surface through areas where the crust is thin.
Hence, springs are fed by the underground aquifers.

Question 3

1 / -0

Observe the following Venn diagrams and identify the correct option regarding the temperatures represented by T₁, T₂, T₃ and T₄.

	T₁	T₂	T₃	T₄
(1)	1°C	100°C	25°C	-1°C
(2)	1°C	25°C	100°C	-1°C
(3)	-1°C	101°C	25°C	0°C
(4)	-1°C	25°C	100°C	25°C

(1)

(2)

(3)

(4)

Solution

At T₁,water exists in the solid state; hence, T₁< 0°C and it can have the value -1°C.
At T₂,water exists in the vapour state; hence, T₂ > 100°C and it can have the value 101°C.
At T₃,water exists in the liquid state, hence, 0°C < T₃< 100°C and it can have the value 25°C.
At T₄,water can exist in both the solid and liquid state; hence, T₄= 0°C.

Question 4

1 / -0

Observe the flow chart and select the option that correctly identifies the processes P, Q, R, X and Y.

	P	Q	R	S
(1)	Freezing	Vaporisation	Sublimation	Condensation
(2)	Vaporisation	Freezing	Condensation	Sublimation
(3)	Vaporisation	Condensation	Freezing	Sublimation
(4)	Freezing	Sublimation	Condensation	Vaporisation

(1)

(2)

(3)

(4)

Solution

Option (2) is correct.

Question 5
1 / -0

________ is observed on the leaves of grass and plants on winter mornings.

A
Dew

B
Fog

C
Mist

D
Hail

Solution

Dew is the water vapour that condenses on cold winter mornings and appears as water drops on the surface of leaves and grass.
Question 6
1 / -0

Consider the following statements:

(i) The liquid in which a substance dissolves is the solvent.
(ii) The substance which gets dissolved in a solvent is the solute.
(iii) On heating a saturated solution, the excess salt gets precipitated from the solution.
(iv) The resultant mixture obtained when no more solute can be dissolved in the solvent is called a saturated solution.

Which of the above statements is not correct?

A
(i)

B
(ii)

C
(iii)

D
(iv)

Solution

Statement (iii) is incorrect because on heating a saturated solution, it becomes unsaturated and would dissolve more solute. Hence, excess salt will get dissolved, rather than precipitated.
Question 7
1 / -0

Which of the following actions will not help in prevention of water pollution?

A
Domestic sewage should be treated before releasing it into water sources.

B
Waste materials such as plastic bags and metal cans should not be disposed in water bodies.

C
Laws should be made to prevent water pollution.

D
Good quality of chemical fertilisers, insecticides and pesticides should be used.

Solution

The use of fertilisers, insecticides and pesticides of a good quality may improve the agricultural produce, but this will not prevent water pollution. Excess of these chemicals get washed into the water bodies and pollutes them.
Question 8
1 / -0

In which of the following cases will evaporation of water be the fastest if equal quantity of water is taken in each of the cases?

A
Water kept in a tumbler in the sunlight

B
Water kept in a tray in the sunlight

C
Water kept in a tumbler in the shade

D
Water kept in a bowl in the sunlight

Solution

Rate of evaporation increases with increase in temperature.
Rate of evaporation increases with increase in the surface area exposed.
Hence, evaporation will be fastest when water is poured in a tray and kept in the sunlight.
Question 9
1 / -0

Which of the following statements is/are false?

a. Red worms used for vermicomposting grind their food with their teeth.
b. Vermicompost contains a large amount of castings, which are, the material that passses through the gut of the worms.
c. Compost does not pollute the environment.

A
Only a

B
Only a and b

C
Only b

D
Only b and c

Solution

The statement 'a' is incorrect.
Red worms don't have teeth and as a result they have little ability to grind their food. During vermicomposting small grains of sand and mineral particles are mixed with food.
In the gizzard these particles are compressed by the action of the gizzard muscle, which grinds food into smaller particles.
Question 10
1 / -0

Which of the following is a renewable resource?

A
Solar power

B
Coal

C
Natural gas

D
Petroleum

Solution

Renewable energy is generally defined as the energy that comes from resources which are naturally replenished. Sunlight is a renewable resource and does not get exhausted by use. Hence, option (1) is the correct answer.
Coal, petroleum and natural gas are fossil fuels and are non-renewable resources.

Question 11

1 / -0

Match the following:

a. Landfill	1. Converting solid waste into manure
b. Composting	2. Putting waste to new use
c. Recycling	3. Area where solid garbage is dumped
d. Biodegradable	4. Waste that undergoes rotting

a - 3, b - 1, c - 2, d - 4

a - 1, b - 3, c - 2, d - 4

a - 3, b - 1, c - 4, d - 2

a - 1, b - 3, c - 4, d - 2

Solution

Landfill is an area where solid garbage is dumped.
Composting is converting solid waste into manure by the action of anaerobic bacteria.
Recycling is putting waste to new use after some processing.
Biodegradable is the waste that which can be decomposed by the bacteria by the action of enzymes secreted by them. Decomposing matter is also said to be rotting .
Hence, the correct match is a - 3, b - 1, c - 2, d - 4.

Question 12
1 / -0

Which of the following options shows the correct sequence of waste management?

A
Treatment and disposal Collection of waste Segregation of waste Reduction and resource recovery

B
Reduction and resource recovery Treatment and disposal Collection of waste Segregation of waste

C
Collection of waste Segregation of waste Reduction and resource recovery Treatment and disposal

D
Collection of waste Treatment and disposal Segregation of waste Reduction and resource recovery

Solution

First of all, the waste is collected.
The waste is then segregated into biodegradable, non-biodegradable and recyclable waste.
Finally the waste is properly treated and disposed.
Hence,the sequence in option (3) is correct.
Question 13
1 / -0

Which of the following statements is/are false?

(a) Empty glass bottles are reusable.
(b) Domestic sewerage is an example of biodegradable waste.
(c) Plastic waste is biodegradable.
(d) To keep the environment clean, we should recycle the waste.

A
Only a

B
Only b and c

C
Only b and d

D
Only c

Solution

Plastic waste is non-biodegradable. Hence, (c) is incorrect.
So, option (4) is the correct answer.

All the other statements are correct.
Empty glass bottles are reusable and doing so will reduce the amount of waste produced.
Domestic sewerage is an example of biodegradable waste and it is decomposed by anaerobic bacteria to form manure.
Recycling of the waste when possible reduces the the amount of garbage and help to maintain a clean environment.
Question 14
1 / -0

Which of the following is not a non-biodegradable waste?

A
Polythene bags

B
Plastics

C
Glass bottles

D
Agricultural waste

Solution

All organic waste,i.e., which comes from plants or animals is biodegradable.
Hence, option (4) is correct.
Question 15
1 / -0

Which of the following statements is/are false?

a.Stray animals often get killed when they swallow plastic bags from the garbage dumps.
b.Burning of polythene bags is an effective method of waste disposal.
c.Waste management is a huge challenge because of the excessive use of plastic.

A
Only a

B
Only a and b

C
Only b

D
Only b and c

Solution

The statement (b) is false because burning of polythene bags is highly undesirable as it releases extremely toxic substance into the environment.
All the other statements are correct.
Plastics are non biodegradable and building up of the non biodegradable waste makes waste management hugely challenging.
Swallowing of polythene bags by the animals is extremely harmful because being non-biodegradable, they just accumulate inside the bodies of these animals and may prove fatal.
Question 16
1 / -0

Analyse the two statements given below and select the correct option.

Statement I: Air is a mixture of different gases.
Statement II: The different gases in the atmosphere forms different layers, with the heaviest gas forming the bottom-most layer.

A
Both statements I and II are correct and statement II is the correct reason for I.

B
Both statements I and II are correct, but statement II is not the correct reason for I.

C
Statement I is correct, but statement II is incorrect.

D
Both statements I and II are incorrect.

Solution

Statement I is correct, but statement II is incorrect.
The gases in the air do not separate out to form layers as they spontaneously move from their higher concentrations to the lower to form a uniform mixture, due to the property of diffusion.

Question 17

1 / -0

Match the components of air given under left column with their characteristics given under right column:

Components of Air	Characteristics
1. Nitrogen	(a) Causes rain on condensing
2. Oxygen	(b) Used by green plants to manufacture food
3. Inert gases	(c) Very unreactive
4. Carbon dioxide	(d) Used in the process of respiration
5. Water vapour	(e) Used to make fertilizers

1 - (e), 2 - (d), 3 - (c), 4 - (b), 5 - (a)

1 - (a), 2 - (b), 3 - (c), 4 - (d), 5 - (e)

1 - (a), 2 - (d), 3 - (c), 4 - (b), 5 - (e)

1 - (e), 2 - (b), 3 - (c), 4 - (d), 5 - (a)

Solution

Components of Air	Characteristics
1. Nitrogen	(e) Used to make fertilizers
2. Oxygen	(d) Used in the process of respiration
3. Inert gases	(c) Very unreactive
4. Carbon dioxide	(b) Used by green plants to manufacture food
5. Water vapour	(a) Causes rain on condensing

Nitrogen is important to the chemical industry. It is used to make fertilisers, nitric acid, nylon, dyes and explosives.
During respiration, oxygen is inhaled and carbon dioxide is exhaled.
Inert gases are very unreactive as they have completely filled outermost shells. There is no need to loss or gain electrons.
Carbon dioxide is used as a raw material by plants in the process of photosynthesis.
Condensation is the process by which water vapour in the air is changed into liquid water.

Question 18

1 / -0

Analyse the given statements:

A. Air is a compound formed by chemical reactions between different gases.
B. Air displays the properties of all the component gases.
C. The gases in the air are essential for the sustenance of life on the Earth.
D. The dust particles in the air play an important role in the formation of clouds.

Which of the following options is the correct analysis of the statements?

	A	B	C	D
(1)	F	F	T	T
(2)	T	F	F	T
(3)	F	T	T	T
(4)	T	F	T	T

(1)

(2)

(3)

(4)

Solution

Only statement A is incorrect as air is a mixture of gases and not a compound.

Question 19
1 / -0

Consider the following statements about inhaled air and exhaled air:

(i) Exhaled air contains more carbon dioxide than inhaled air.
(ii) Exhaled air is cooler than inhaled air.
(iii) Inhaled air contains more moisture than exhaled air.
(iv) Inhaled air contains more oxygen than exhaled air.

Which of the above statements are correct?

A
(i) and (ii)

B
(ii) and (iii)

C
(iii) and (iv)

D
(i) and (iv)

Solution

Statements (i) and (iv) are correct.
The relative concentration of CO₂in the exhaled air is more and that of O₂ is less.
Also, exhaled air is warmer than inhaled air and has more moisture content.

Question 20

1 / -0

Study the dichotomous key and identify W, X, Y and Z.

I. (i) A gaseous component of air Go to II
(ii) A solid component of air
II. (i) The second most abundant gas in the atmosphere
(ii) Forms a much lesser percentage of air Go to III
III. (i) A raw material for photosynthesis
(ii) A noble gas

	W	X	Y	Z
(1)	Argon	Carbon dioxide	Nitrogen	Neon
(2)	Dust particles	Oxygen	Carbon dioxide	Argon
(3)	Dust particles	Nitrogen	Argon	Carbon dioxide
(4)	Dust particles	Nitrogen	Carbon dioxide	Argon

(1)

(2)

(3)

(4)

Solution

'W' represents dust particles, which form a solid component of air.
'X' represents oxygen, which forms 21% of the air and is the second most abundant component of air.
'Y' represents carbon dioxide, which is a raw material for photosynthesis.
'Z' represents argon, which is a noble gas and forms 0.098% of the air.

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Re-Attempt Weekly Quiz Competition

Water Test - 6

Result

Water Test - 6

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SHARING IS CARING

Question 1

(1)

(2)

(3)

(4)

Solution

Question 2

(i) and (ii)

(ii) and (iii)

(i), (ii) and (iv)

(i), (ii) and (iii)

Solution

Question 3

(1)

(2)

(3)

(4)

Solution

Question 4

(1)

(2)

(3)

(4)

Solution

Question 5

Dew

Fog

Mist

Hail

Solution

Question 6

(i)

(ii)

(iii)

(iv)

Solution

Question 7

Domestic sewage should be treated before releasing it into water sources.

Waste materials such as plastic bags and metal cans should not be disposed in water bodies.

Laws should be made to prevent water pollution.

Good quality of chemical fertilisers, insecticides and pesticides should be used.

Solution

Question 8

Water kept in a tumbler in the sunlight

Water kept in a tray in the sunlight

Water kept in a tumbler in the shade

Water kept in a bowl in the sunlight

Solution

Question 9

Only a

Only a and b

Only b

Only b and c

Solution

Question 10

Solar power

Coal

Natural gas

Petroleum

Solution

Question 11

a - 3, b - 1, c - 2, d - 4

a - 1, b - 3, c - 2, d - 4

a - 3, b - 1, c - 4, d - 2

a - 1, b - 3, c - 4, d - 2

Solution

Question 12

Treatment and disposal Collection of waste Segregation of waste Reduction and resource recovery

Reduction and resource recovery Treatment and disposal Collection of waste Segregation of waste

Collection of waste Segregation of waste Reduction and resource recovery Treatment and disposal

Collection of waste Treatment and disposal Segregation of waste Reduction and resource recovery

Solution