Water Test

Result

Water Test - 2

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Weekly Quiz Competition

Question 1

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 2
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.
Question 3
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

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 4
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.
Question 5
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 6
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 7

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) Major component of air

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) Major component of air
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

Question 8
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

A
(1)

B
(2)

C
(3)

D
(4)

Solution

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

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

Water Test - 2

Result

Water Test - 2

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Question 1

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 2

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

Question 3

Only a

Only b and c

Only b and d

Only c

Solution

Question 4

Polythene bags

Plastics

Glass bottles

Agricultural waste

Solution

Question 5

Only a

Only a and b

Only b

Only b and c

Solution

Question 6

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

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

Statement I is correct, but statement II is incorrect.

Both statements I and II are incorrect.

Solution

Question 7

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

Question 8

(1)

(2)

(3)

(4)

Solution

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