3.Carbon dioxide (CO2)

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  1. Which is the source of chlorofluorocarbons ?

(A) Thermal power plants

(B) Automobiles

(C) Refrigeration and Air Conditioning

(D) Fertilizers

Answer: (C)

  1. Which of the following is a source of methane?

(A) Wetlands

(B) Foam Industry

(C) Thermal Power Plants

(D) Cement Industry

Answer: (A) 

  1. Which of the following is a source of emissions leading to the eventual formation of surface ozone as a pollutant?

(A) Transport sector

(B) Refrigeration and Air-conditioning

(C) Wetlands

(D) Fertilizers

Answer: (A)

  1. The major source of the pollutant gas, carbon mono-oxide (CO), in urban areas is

(A) Thermal power sector

(B) Transport sector

(C) Industrial sector

(D) Domestic sector

Answer: (B) 

  1. Which of the following nations has the maximum per capita emissions of carbon di-oxide?

(A) China

(B) Japan

(C) USA

(D) India

Answer: (C)

  1. Which one of the following green house gases has the shortest residence time in the atmosphere?

(A) Chlorofluorocarbon

(B) Carbon dioxide

(C) Methane

(D) Nitrous oxide

Answer: (C) 

  1. One of the anthropogenic sources of gaseous pollutants chlorofluorocarbons (CFCs) in air is

(A) Cement Industry

(B) Fertiliser industry

(C) Foam industry

(D) Pesticide industry

Answer: (C)

  1. In terms of total CO2 emissions from a country, identify the correct sequence:

(A) U.S.A. > China >India> Russia

(B) China> U.S.A>India>Russia

(C) China>U.S.A.>Russia>India

(D) U.S.A>China>Russia>India

Answer: (B)

  1. India’s contribution to total global carbon dioxide emissions is about :

(1) ~ 3% (2) ~ 6% 

(3) ~ 10% (4) ~ 15%

Answer : 2

  1. As part of Intended Nationally Determined contributions, Indian government through additional forest and tree cover has resolved to create an additional carbon sink (in terms of carbon dioxide equivalent) by year 2030 to the extent of

(1) 3.5 to 4 billion tons

(2) 2.5 to 3 billion tons

(3) 1.5 to 2 billion tons

(4) 1 to 1.5 billion tons

Answer : 2

Q-36 Which of the following gases initiates a chain reaction that breaks-down ozone in the upper atmosphere?

Options:-

  1. Carbon dioxide
  2. Nitrogen Dioxide
  3. Hydrogen sulphide
  4. Chlorine

Ans:4

Q.44 How much carbon is being added to the atmosphere by burning of fossil fuels ?

  1. 6-9 billion tons
  2. 9-12 billion tons
  3. 4-6 billion tons
  4. 2-6 billion tons

Answer: 1

Q-36 The two major processes involved in the carbon cycle are:

Options:-

  1. Photosynthesis and respiration
  2. Deposition and erosion
  3. Fixation and denitrification
  4. Evaporation and transpiration

Ans:1

Q-44 Which of the following best describes the mechanism of the greenhouse effect in earth’s atmosphere?

Options:-

  1. Ultraviolet radiation from the sun is absorbed by Ozone layer in the stratosphere.
  2. Gamma radiation from the sun is absorbed at ground level by dust particles in the atmosphere.
  3. Infrared radiation from earth’s surface is absorbed by gases in the atmosphere.
  4. Cosmic radiation from the space is absorbed by gases in the atmosphere.

Ans:3

  1. In the formation of surface Ozone, which of the following do play an important role?

(a) Oxides of nitrogen

(b) Oxides of sulphur

(c) Sunlight

(d) Carbon monoxide

Choose the correct answer from the code given below :

(1) (a), (b), (c)

(2)  (b), (c),(d )

(3)  (a), (c), (d)

(4) (a), (b), (d)

Ans: 3

  1. Assertion (A) : High concentration of ozone in the lower troposphere is desirable.

Reasons (R) : Ozone present in the atmosphere protects the having organisms on the surface of earth from the harmful ultra-violet radiation of the sun.

 

Choose the correct answer from the options given below :

(1) Both (A) and (R) are true and (R) is the correct explanation of (A)

(2) Both (A) and (R) are true but (R) is not the correct explanation of (A)

(3) (A) is true but (R) is false

(A) (A) is false but (R) is true

Ans: 4

Q.43 Identify the correct sequences of countries in decreasing order of their contribution to global carbon dioxide emissions?

  1. USA 
  2. China 
  3. Russia
  4. India
  5. Japan

Choose the correct answer from the options given below:

  1. A, B, D, C, E,
  2. B, A, D, C, E
  3. B, A, D, E, C
  4. A, B, D, E, C

Ans:2

Q.45 In case of which of the following primary pollutants, the man made contributions to global emissions (million tonnes per year) is more compared to that from natural sources?

  1. Sulphur dioxide
  2. Nitric oxide
  3. Methene
  4. Carbon oxide

Ans:1

Q.42 Identify the correct sequence of energy sources in terms of their heat of combustion in increasing order

  1. Methane
  2. Natural fats and oils
  3. Dry wood
  4. Green wood

Choose the  correct answer from the options given below

  1. A, C, B, D
  2. D, C, B, A
  3. D, B, C, A
  4. D, C, A, B

Ans:2

Q43.  Identify the correct sequence of the countries in decreasing order of their contributes to per capita emissions of carbon dioxide emissions at present

  1. India
  2. China
  3. USA
  4. Japan 
  5. Choose the correct answer from the options given below:
  1. C, D,B,A
  2. B,C, A, D
  3. D, B, C, A
  4. C, B, D, A

Ans:1

Q.36 Identify the correct sequence of countries contributing to global CO2 emission in decreasing order from fossil fuel burning, cement manufacturing and gas flaring in the year 2014

  1. USA
  2. EU-28
  3. China
  4. Russia

Choose the correct answer from the given below

  1. C, A, B, D
  2. A, C, B, D
  3. A, B, C, D
  4. A, C, D, B

Ans:1

Q.37 Identify the correct sequence of Carbon (C) to Nitrogen ( N) ratio decreasing order in organic waste material

  1. Food waste
  2. Leaves and foliage
  3. Paper
  4. Cow manure

Choose the correct answer from the options given below

  1. C, B, D, A
  2. C, A, D, B
  3. B, C, D, A
  4. B, D, C, A

Ans:1

Q.36 Identify the correct sequence in increasing order of the carbon content per  unit mass of the following reservoirs of carbon in terrestrial environment

  1. Plants 
  2. Peat
  3. Soil organic matter
  4. Fossil fuels

Choose the correct answer from the options given below

  1. B, A, C, D
  2. A, C, B, D
  3. B, C, D, A
  4. B, A, D, C

Ans:

Q.39 Identify the correct sequence of sectrol global CO2Emission in increasing order as per IPCC (2014) report

  1. Electricity and heat production
  2. Bildiings
  3. Transportation
  4. Industry

Choose the correct answer from the options given below

  1. B, C, D, A
  2. B, C, A, D
  3. B, D, C, A
  4. B, D, A, C

Ans:1

Q.36 TO put the world on a least cost pathway to limiting global warming to 2(degree)C Above the pre industrial level, global greenhouse gas emissions by 2030 with reference to 2017, required reducation to the extent of

  1. 25%
  2. 15%
  3. 10%
  4. 20%

Ans:1

Q.37 Identify the correct sequence in decreasing order of the of the carbon content per unit mass of the following carbon reservoirs in the aquatic environment of oceans

  1. Sediments
  2. Living organisms
  3. Dissolved organic matter 
  4. Dissolved inorganic matter

Choose the correct answer from the options given below

  1. D, A, B, C
  2. A, D, C, B
  3. B, C, A, D
  4. C, B, A, D

Ans:2

Q.38 Given are two statements

Assertion A : Hydrofluorocarbons (HFCs) need to be phased out to protect the Ozone layer 

Reason R : HFCs have a high global warming potential

In the light of the above the statements, choose the most appropriate answer from the options given below

  1. Both A and R are correct and R us the correct explanation of A
  2. Both A and R are correct but R is NOT the correct explanation of A 
  3. A is correct but R is not correct 
  4. A is not correct but R is  correct

Ans:4

Q.36 Contamination of aquatic environment by Polychlorinated Biphenyls (PCBs) can originate from  

(A) Sewage effluent 

(B) Waste incinerators

(C) Toxic dumps 

(D) Tharmal power plants 

(E) Transport sector

Choose  the correct answer from the options given below

(1)  (A) (C)  (E) only

(2)  (A) (B)  (D) (E) only

(3)  (B) (C)  (D) only

(4)  (A) (B) (C) only

Ans:4

Q.39 Which of the following sources of energy on combustion produces maximum carbon dioxide per unit energy output or heat content?

(1) Coal (sub-bituminous)

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(2) Natural gas

(3) Diesel fuel and heating oil 

(4) Gasoline (without ethanol)

Ans:1

Q.37 Given below are two statements

Statement I : Two sounds of same intensity but different frequency characteristics may appear to be different loudness.

Statement II : The response of the human ear to noise at different frequencies is not uniform.

In the light of the above statements, choose the most appropriate answer from the options given below

(1) Both statement I and Statement II are correct

(2) Both statement I and Statement II are incorrect

(3) Statement I is correct but statement II is incorrect

(4) Statement I is incorrect but statement II is correct

Ans:1

Q.37 Arrange the global warming potential of a molecule of the following greenhouse gases (relative to CO2 ) in decreasing order :

(A) Methene 

(B) Nitrous oxide 

(C) CFC -12

(D) CFC -11 

(E) Sulphur hexafluoride (Sf6)

Choose the  correct answer from the options given below :

(1)  (E) > (D) >  (C)  > (B) > (A)

(2) (C)  > (E) > (D) > (B) > (A)

(3)  (D) > (E) >  (C)  > (B) > (A)

(4)  (E) > (C)  > (D) > (B) >  (A) 

Ans:4

Q.37 Given below are two statements:   one is labelled as assertion( A) and the other is labelled as reason( R)

Assertion (A) : Carbon dioxide emissions from bioenergy. Production have traditionally been excluded from most emission inventories and climate impact studies.

Reason (R) :  Carbon dioxide emissions associated with production of bioenergy are significantly less compared to those from combustion of fossil fuels.

In the light of the above statements, choose the correct answer from the options given below

(1) Both(A) and R are true and (R) is the correct explanation of (A)

(2) Both (A) and R are true but (R) is not the correct explanation of (A)

(3) (A) is true but (R) is false

(4) (A) is false but (R) Is true

Ans:2

 

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