PPSC Chemistry Full Book Test With Answers

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PPSC Chemistry Full Book Test

Sr. # Questions Answers Choice
1 Which of the following does NOT react with sodium hydroxide solution. Fat Vinegar Ethanol Water
2 Soap is soluble in grease because it Is non polar Has a hydrophobic head Has a hydrophobic tail Has an ionic head and a hydrocarbon tail
3 When a drop of detergent solution is added onto a clean towel. It spreads instead of existing as a droplet Which of the following statements explains this phenomenon. Detergent acts as an emulsifying agent Detergent reduce surface tension of water Detergent reduces surface tension of water All of above
4 The green color of water in a lake is due to Excessive growth of sea weeds Algae Pollution Grass
5 Soap and detergent remove the direct form clothes due to. Osmosis Gravity Lowering of interfacial tension Diffusion
6 Which of the following are anionic detergents. Sodium salts of sulfonated long chain alcohol Ester of stearic acid and polythlene glycol Quaternary ammonium salt of amine with acetate ion Sodium salts of sulfonated long chain hydrocarbons
7 Polyethylene Glycols are used in the preparation of which tye of detergetns. Cationic detergents Anionic detergents Non ionic detergent soaps None of above
8 In the process of preparation of detergents the organic acids produced are neutralized with. Sodium hydroxide Sodium sulphate Sodium chloride Potassium hydroxide
9 The by -product of the process of saponification is. Methanol Glycol Glycerol Absolute alcohol
10 During the preparation of soap the liquid separated by distillation is Sodium hydroxide Oil Fats Glycerol
11 Which of the following is a component of soap. Sodium sulphate Sodium stearate Sodium chloride Sodium bromide
12 Detergents are known to pollute revers and water ways. However, detergents can be made biodegradable and pollution free by taking. cyclic hydrocarbon chain Shorter hydrocarbon chain Unbranched hydrocarbon chain Benzenoid hydrocarbons
13 The smog is essentially caused by the presence of. O3 and N2 O2 and N2 Oxides of sulphur and nitrogen O2 and O3
14 Which of the following responsible for depletion of ozone layer in upper strata of the atmosphere. Polyhalogens Ferrocene Freons Fullerencs
15 Ozone is stratosphere is depleted by CF2Cl2 C7F16 C6H6Cl6 C6F6
16 When rain is accompanied by a thunderstorm, the collected rain water will have pH Slightly lower than that of rain water without thunderatorm Slightly higher than that of rain water without thunderastorm Uninfluenced by occurrence of thunderatorm Which depends on amount of dust in air
17 Earth is protected from U.V. radiations by Carbon dioxide layer Oxygen layer Ozone layer Troposphere
18 Which of the following is not a chemical pollutant. Solid waste Noiso Insecticides Liquid waste
19 Long diseases are about four times more in urban areas as compared to rural areas. This is due to the presence of which of the following. in atmosphere. CO2 NO2 O2 N2
20 Which of the following substance is not present in acid rain. Sulphuric acid Nitric acid Acetic acid Sulphurous acid
21 Which of the following is a source of energy but does not cause pollution. Gaslone Nuclear power plant Fossil fuels Sun
22 Ozone depletion in stratosphere will result in Forest fires Increased incidence of skin cancer Global warming None of the above
23 Increased asthmatic attacks in certain seasons are related to. Inhalation of seasonal pollens Eating of seasonal vegetables Low temperature Wet and dry environment
24 Ozone layer of upper atmosphere is being destroyed by chlorofluorocarbons SO2 Photochemical oxidants O2 and CO2 Smog
25 Domestic waste mostly constitutes Non biodegradable pollution Biodegradable pollution Effluents Air pollution
26 Which of the following is a mode of controlling pollution in big cities. Cleanliness and less use of insecticides Proper disposal of organic wastes, sewage and industrial effluents Broader roads and shifting of factories out of the residential areas All of above
27 Burning of fossil fuels is the main sources of which of the following pollutant. Nitrogen oxide Nitric oxide Nitrous oxide Sulphur dioxide
28 Carbon dioxide content in atmosphere is 0.0034% 0.034 % 0.34 % 3.4 %
29 Which of the following is atmospheric pollutant. CO2 CO O2 N2
30 Drained sewage has B.O.D. More than that of water Less than that of water Equal to that of water None of the above
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