Fish eating birds (D)
D CPhytoplankton
(0.003 ppm)Zooplankton (A) Small fish (B)Large fish (C)A B C D
(a) 0.04 ppm 2 ppm 0.5 ppm 25 ppm
(b) 0.006 ppm 2 ppb 4 ppm 8 ppb
(c) 0.04 ppm 0.5 ppm 2 ppb 16 ppb
(d) 0.04 ppm 0.5 ppm 2 ppm 25 ppm- Identify the mismatched pair.
(a) ODS – Chloroflurocarbons
(b) Slash and burn agriculture – Deforestation
(c) Methyl isocyanate – Bhopal gas tragedy
(d) Ecosan toilet – Friends of Arcata - Read the following statements with reference to hot
waste water produced by thermal power plants. Select the
incorrect ones.
(i) It causes reduction of dissolved oxygen content of water.
(ii) It is used as natural fertilisers.
(iii) It causes undesirable changes in algal population.
(iv) It causes decrease in microbial activity in water.
(a) (i) and (iii) only (b) (ii) and (iv) only
(c) (iii) and (iv) only (d) (ii), (iii) only - Read the given statements and select the correct option.
(i) Snow blindness occurs due to inflammation of cornea
by UV-A radiations.
(ii) As per National Forest Policy, hills should have a forest
cover of 33% while in plains it should be 67%.
(iii) The value of chemical oxygen demand is always higher
than biological oxygen demand.
(iv) Methane is the most abundant hydrocarbon in the
atmosphere.
(a) (i) and (ii) are correct.
(b) (iii) and (iv) are correct.
(c) (i), (ii) and (iv) are incorrect.
(d) (ii) and (iii) are incorrect.- Read the following statements and select the correct option.
(i) Global warming is likely to cause extinction of more
than one million species of animals and plants by 2050.
(ii) Secondary pollutants are absent in classical smog.
(iii) Because of greenhouse flux, the mean annual
temperature of earth is 25°C.
(iv) Delhi is the first city of the world to use CNG for its
public transport system.
(a) (i) and (iv) are correct. (b) (ii) and (iii) are correct.
(c) (i), (ii) and (iii) are incorrect. (d) (i), (ii) and (iv) are correct.- X is a type of combustion inside chambers in the absence
of oxygen at an elevated temperature of 1650°C. It does
not yield pollutants but industrial gases and other useful
substances are produced. X is
(a) incineration (b) sludge burning
(c) composting (d) pyrolysis. - Read the given statements and state which ones are true (T)
and which ones are false (F).
(i) The second R or rule of effective waste management
relates to reuse the articles again.
(ii) The second R relates to reduce generation of waste in
all operations from mining to manufacture.
(iii) The third R relates to collecting the waste and broken
articles and disposing them of properly.
(iv) The third R relates to recycling by collecting the waste
and broken articles and manufacturing a new product.
(i) (ii) (iii) (iv)
(a) T F T F
(b) T F F T
(c) F T F T
(d) T T T F - Read the following statements and select the correct ones.
(i) Ambient noise level in industrial zone should be 75 dB
in day time and 70 dB during night.
(ii) Ambient noise level in residential zone should be 65 dB
and 50 dB in day and night time respectively.
(iii) Ambient noise level in silence zone should be 45 dB
and 30 dB in day and night time respectively.
(iv) Ambient noise level in residential zone should be 55 dB
and 45 dB in day and night time respectively.
(v) Ambient noise level in commercial zone should be 60
dB and 50 dB in day and night time respectively.
(a) (i) and (ii) only (b) (iii), (iv) and (v) only
(c) (i) and (iv) only (d) (i) and (v) only - Identify A, B and C in the given table and select the correct
option.
Event Year Aim
(i) IPCC A A world climatic programme was
prepared.
(ii) B 1997 Reduction in overall greenhouse
gas emission was committed.
(iii) C 2012 Reconciling the economic and
environmental goals of the global
community.
(a) A – 1986, B – Kyoto Protocol, C – Beijing Protocol
(b) A – 1988, B – Montreal Protocol, C – Rio + 20
(c) A – 1986, B – Montreal Protocol, C – Beijing Protocol
(d) A – 1988, B – Kyoto Protocol, C – Rio + 20