41. In which year, Kavar Bird Sanctuary was recognised as a bird sanctuary in Bihar?
[A] 1970
[B] 1969
[C] 1971
[D] 1968
Answer: B [1969]
Notes:
Kavar Bird Sanctuary was recognised as a bird sanctuary in the year 1969 and it is recognised as a Wet land.
42. The Forests of West Bengal can be classified into how many types?
[A] 3
[B] 4
[C] 5
[D] 6
Answer: D [6]
Notes:
The forests of West Bengal are classified into six categories on the basis of soil, moisture, altitude and other climatic factors. These are as follows:
i. Tropical Moist Deciduous Forests, ii. Tropical Dry Deciduous Forests, iii. Sub-tropical Broad-leafed Wet Hill Forests, iv. Montane Wet Temperate Forests, v. Littoral and Swamp Forests/ The Mangroves Forests, and vi. Sub-alpine Forests.
43. Littoral and Swamp Forests can be seen in–
[A] Howrah
[B] Kolkata
[C] South 24 Pargana
[D] Hooghly
Answer: C [South 24 Pargana ]
Notes:
Littoral and Swamp Forests also known as
The Mangrove Forests is found in Ganga-Brahmaputra delta (Sundarbans) i.e. in the districts of South 24
Parganas and Southern region of North 24 Parganas.
44. In which year Department of Environment was established in West Bengal Government?
[A] 1982
[B] 1983
[C] 1984
[D] 1985
Answer: A [1982]
Notes:
Department of Environment is a department jurisdicted by Government of West Bengal. It was establisted in 1982. The department is headed by a Minister in Charge Ratna De (Minister of State, Independent Charge), with Principal Secretary (Sri Vivek Kumar) as administrative head.
45. Air quality depicting PM- 2.5 is more hazardous to____:
[A] National Parks
[B] Botanical Gardens
[C] Archaeological Monuments
[D] Old Men and Women
Answer: D [Old Men and Women]
Notes:
Fine particles known as PM-10 and PM-2.5 can penetrate deep into the lungs, creating health problems. People with heart or lung diseases, older adults, and children are most likely to have problems because of contact with particle pollution. Short-term exposure to PM among pregnant women has been associated with prematurity and growth retardation.
46. Which of the following greenhouse gases has the greatest heattrapping ability?
[A] Carbon dioxide
[B] Chlorofluoro carbon
[C] Nitrous oxide
[D] Methane
Answer: B [Chlorofluoro carbon]
Notes:
Gases that trap heat in the atmosphere are called greenhouse gases. Global Warming Potentials (GWPs) are used to compare the abilities of different greenhouse gases to trap heat in the atmosphere. Carbon dioxide is used as the base for all the calculations, so its global warming potential is 1.2. The higher the GWP, the more heat the specific gas can keep in the atmosphere. Fluorinated gases : Chlorofluorocarbons, Hydrofluorocarbons, perfluorocarbons, sulfur hexafluoride, and nitrogen trifluoride : are synthetic, powerful greenhouse gases that have highest heat trapping abilities. These gases are 1,000; 10,000 even 20,000 times more powerful than Carbon dioxide (CO2) at trapping heat and many can stay in our atmosphere for thousands of years.
47. The tree popularly known as Green Gold, but which is an ecological disaster, is ____:
[A] Banyan
[B] Peepal
[C] Eucalyptus
[D] None of the above
Answer: C [Eucalyptus]
Notes:
Several trees such as Neem, bamboo, eucalyptus, etc., are known as ‘green gold.’ Eucalyptus is called green gold because of its widespread use in the international wood products and pulp industry. However, the eucalyptus tree has been accused of being an environmental disaster with its thirst for water and propensity towards soil depletion. Besides, it is host to Cryptococcus’s, a fungus that attacks the human nervous system.
48. What is farming along with animal husbandry called?
[A] Mixed farming
[B] Mixed agriculture
[C] Truck farming
[D] Dairy farming
Answer: A [Mixed farming]
Notes:
When on a farm along-with crop production, some other agriculture based practice like poultry, dairy farming or bee keeping etc. is adopted, then this system of farming is known as mixed farming. It is dominant in India, where most farms have a mixture of fields and pastures.
49. The Biosphere is the zone of Earth where life is found. It includes parts of–
a. Hydrosphere
b. Lithosphere
c. Stratosphere
d. Troposphere
Select the Answer from the following:
[A] (a) and (c)
[B] (a) and (d)
[C] (a) (b) and (d)
[D] (b), (c) and (d)
Answer: C [(a), (b) and (d)]
Notes:
The Biosphere is the global sum of all ecosystems. It can also be called the Zone of life on Earth. The Biosphere is the global ecological system integrating all living beings and their relationships, including their interaction with the elements of the lithosphere, hydrosphere and atmosphere.
50. Potential of air pol lution increases when the ventilation coefficient is _____:
[A] > 11,000 m2/s
[B] > 7,600 m2/s
[C] < 3,600 m2/s
[D] < 6,000 m2/s
Answer: D [< 6,000 m2/s]
Notes:
The product of the maximum mixing depth and the average wind speed within the mixing depth is sometimes used as an indicator of the atmosphere’s dispersive capability. This product is known as the ventilation coefficient (m2/s). Values of ventilation coefficient less than about 6000 m2/s are considered indicative of high air pollution potential (Portelli and Lewis, 1987).
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