NAT II Biological Science Chemistry With Answers

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NAT II Biological Science Chemistry

Sr. # Questions Answers Choice
1 Acid rains are produced by Excess NO<sub>2</sub> and SO<sub>2</sub>from burning fossil fuels Excess production of NH<sub>3</sub> by industry and coal gas Excess release of carbon monoxide by incomplete combustion Excess formation of CO<sub>2</sub> by combustion and animal respiration
2 Carbon monoxide is pollutant as it Inactivates nerves Inhibits glycolysis Combines with oxygen Combines with hemoglobin
3 SO2 and NO2produce pollution by increasing Alkalinity Acidity Neutrality Buffer action
4 Pollutant of automobile exhausts that affects nervous system/produces mental diseases is Mercury Lead Nitrogen oxide Sulphur oxide
5 Sulphure dioxide affects Cell wall Plasmodesmata All membrane systems Nucleus
6 Cyclone collector is used for minimizing Radioactive pollution Air pollution Noise pollution Water pollution
7 Minamata disease is due to pollution of Organic waste Oil spill in water Industrial waste containing mercury into fishing water Arsenic into the atmosphere
8 Which one is not a pollutant normally? Hydrocarbons Carbon dioxide Carbon monoxide Sulphur dioxide
9 Chief air pollutant which is likely to deplete ozone layer Suphure dioxide Carbon dioxide Carbon dioxide Nitrogen oxides and chloro flrorocarbons
10 Atmosphere of big/metropolitan cities is polluted most by Automobile exhausts Pesticide residue Household waste Radio-active fall out
11 Detergents are Synthetic products Natural products Both A and B None of the above
12 In N.W.F.P the phosphate fertilizers are produced at D.I.Khan Haripur Nowshera Dargai
13 Which of the following nitrogen fertilizer contain more nitrogen NaNO<sub>3</sub> KNO<sub>3</sub> NH<sub>4</sub>NO<sub>3</sub> Urea
14 Natural fertilizer provides potassium in the form of K2O (potash) 1.5 kg 3 kg 4.5 kg 6.5 kg
15 Natural fertilizer provides phosphorus to plants in the form of P2O5 1.2 kg 2.2 kg 3.2 kg 4 kg
16 Which of these is the most widely used nitrogen fertilizer in Pakistan Urea Ammonium nitrate Ammonium Sulphate Ammonium chloride
17 Ammonia gas used directly as a fertilizer is injected into the soil at a depth of about Two inches Three inches Five inches Six inches
18 The percentage of nitrogen in urea is 46 60 70 80
19 Fertililzer are made by Nature only Artificial methods only Both artificial and natural methods None of the above
20 The disaccharide present in milk is Sucrose Maltose Lactose Cellobiose
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