56- Ozone day is observed on ___________.
(A) 3rd January
(B) 16th September
(C) 10th November
(D) 26th March
57- The unit by which thickness of Ozone layer is measured ___________.
(A) Psi
(B) A.M.U.
(C) dB
(D) D.U.
58- Ozone layer is present in
(A) Troposphere
(B) Mesosphere
(C) Thermosphere
(D) Stratosphere
59- The process of burning solid wastes without oxygen is called ___________.
(A) Combustion
(B) Decomposition
(C) Incineration
(D) Eutrophication
60- Which one of the following gases can deplete the ozone layer in the upper atmosphere?
(A) Methane
(B) Ammonia
(C) Carbon tetrachloride
(D) Sulphur dioxide
61- Some aquatic animals die due to algal bloom because of lack of what?
(A) Oxygen
(B) Nitrogen
(C) Carbon dioxide
(D) Sculpture
62- What is the main reason for desertification?
(A) Biodiversity
(B) Acid Rain
(C) Urbanisation
(D) Under-grazing
63- The natural ageing of a lake by nutrient enrichment is called ___________.
(A) Biomagnification
(B) Eutrophication
(C) Algal bloom
(D) Desertification
64- Name the problems associated with Green Revolution.
(A) Waterlogging
(B) Soil salinity
(C) Both A and B
(D) None
65- FOAM is associated with ___________.
(A) STDs (Sexually Transmitted Diseases)
(B) STP (Sewage Treatment Plant)
(C) MTP (Medical Termination of Pregnancy)
(D) MOET (Multiple Ovulation Embryo Transfer)
66- Which of the compounds are responsible for accelerated eutrophication?
(A) Sulphates
(B) Nitrates
(C) Phosphates
(D) Both B and C
ANSWERS:
56-(B), 57-(D), 58-(D), 59-(C), 60-(C), 61-(A), 62-(C), 63-(B), 64-(C), 65-(B), 66-(D)