[{"id":130955,"question":"In macromolecules DP stands for","choices":[{"text":"Dissociation parameter","value":"A"},{"text":"Dissociation polymer","value":"B"},{"text":"Degree of polymerization","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":130954,"question":"A polymer may be","choices":[{"text":"Linear","value":"A"},{"text":"Branched","value":"B"},{"text":"Cross linked","value":"C"},{"text":"All of these","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":130953,"question":"Macromolecules or polymers are large molecules built up from small molecules called monomers. This hypothesis put forward by","choices":[{"text":"schrodixger","value":"A"},{"text":"standinger","value":"B"},{"text":"Lewsi","value":"C"},{"text":"newton","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":130952,"question":"Hydrolysis of protein by 6M HCl gives peptides and then alpha-amino acids. How many alpha-amino acids molecules are obtained on the hydrolysis of a tetrapeptide","choices":[{"text":"2","value":"A"},{"text":"3","value":"B"},{"text":"4","value":"C"},{"text":"5","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":130951,"question":"The amino group in 19 alpha-amino acids is primary; only one alpha-amino acid has secondary amino group which one is that","choices":[{"text":"Alanine","value":"A"},{"text":"Glutamic acid","value":"B"},{"text":"Glycine","value":"C"},{"text":"Proline","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":130950,"question":"Which of the following alpha-Amino acids has basic R-group","choices":[{"text":"Proline","value":"A"},{"text":"Glutamic acid","value":"B"},{"text":"Histidine","value":"C"},{"text":"Valine","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":130949,"question":"Which is not an essential amino acid","choices":[{"text":"Leucine","value":"A"},{"text":"Methionine","value":"B"},{"text":"Histidine","value":"C"},{"text":"Lysine","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":130948,"question":"Essential alpha-amino acids are those which are necessary in the diet.<div>Which one is an essential alpha-amino acids</div>","choices":[{"text":"Alanine","value":"A"},{"text":"Aspartic acid","value":"B"},{"text":"Glycine","value":"C"},{"text":"Tryptophan","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":130947,"question":"Amino acids are bifunctional organic compounds what are the two function groups","choices":[{"text":"Carboxylic acid and alcohol","value":"A"},{"text":"Acohol and aldehyde","value":"B"},{"text":"Carboxylic acids and ketone","value":"C"},{"text":"Amino group and carboxylic acid","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":130946,"question":"Detergents are","choices":[{"text":"synthetic products","value":"A"},{"text":"natural products","value":"B"},{"text":"both a and b","value":"C"},{"text":"none of the above","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":130945,"question":"Surfactants are organic compounds; used in detergents which reduce the","choices":[{"text":"viscosity of water","value":"A"},{"text":"surface tension of water","value":"B"},{"text":"boiling point of water","value":"C"},{"text":"wetting ability of water","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":130944,"question":"The chemical reactivity of glass is reduced by the use of","choices":[{"text":"fluxes","value":"A"},{"text":"formers","value":"B"},{"text":"stabilizers","value":"C"},{"text":"none of the above","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":130943,"question":"Macro-nutrients are required in quantities ranging from","choices":[{"text":"5 kg - 200 kg","value":"A"},{"text":"2 kg - 100 kg","value":"B"},{"text":"1 kg - 50 kg","value":"C"},{"text":"10 kg - 100 kg","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":130942,"question":"Which woody raw material is used for the manufacture of paper pulp?","choices":[{"text":"cotton","value":"A"},{"text":"bagasse","value":"B"},{"text":"poplar","value":"C"},{"text":"rice staw","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":130941,"question":"The development of industries was a direct result of which major factor","choices":[{"text":"population","value":"A"},{"text":"living standards","value":"B"},{"text":"depletion of resources","value":"C"},{"text":"all of these","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":130940,"question":"Silk is an example of","choices":[{"text":"animal fiber","value":"A"},{"text":"vegetable fibre","value":"B"},{"text":"mineral fibre","value":"C"},{"text":"none of these","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":130939,"question":"Substances that tend to decrease the activity of enzymes are called","choices":[{"text":"coenzyme","value":"A"},{"text":"activators","value":"B"},{"text":"inhibitors","value":"C"},{"text":"apoenzyme","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":130938,"question":"How many zones through which the charge passes in a rotary kiln?","choices":[{"text":"4","value":"A"},{"text":"3","value":"B"},{"text":"2","value":"C"},{"text":"5","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":130937,"question":"Which is not a calcareous material?","choices":[{"text":"lime","value":"A"},{"text":"clay","value":"B"},{"text":"marble","value":"C"},{"text":"marine shell","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":130936,"question":"The word paper is derived from the name of which reedy plant","choices":[{"text":"rose","value":"A"},{"text":"sun flower","value":"B"},{"text":"papyrus","value":"C"},{"text":"water hyacinth","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":130935,"question":"During the manufacturing process of cement the temperature of the decomposition zone goes up to","choices":[{"text":"600<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°C</span>","value":"A"},{"text":"800<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°C</span>","value":"B"},{"text":"1000<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°C</span>","value":"C"},{"text":"1200<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°C</span>","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":130934,"question":"Which woody raw material is used of the manufacture of paper pulp?","choices":[{"text":"cotton","value":"A"},{"text":"bagasse","value":"B"},{"text":"poplar","value":"C"},{"text":"rice straw","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":130933,"question":"The number of paper industries in Pakistan are","choices":[{"text":"30","value":"A"},{"text":"25","value":"B"},{"text":"35","value":"C"},{"text":"20","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":130932,"question":"At present the number of cement factories is Pakistan are","choices":[{"text":"20","value":"A"},{"text":"22","value":"B"},{"text":"25","value":"C"},{"text":"30","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":127529,"question":"Which one of the following is used as coagulant for purification potable water","choices":[{"text":"Copper sulphate","value":"A"},{"text":"Alum","value":"B"},{"text":"Barium sulphate","value":"C"},{"text":"Nickel sulphate","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":127528,"question":"Chose a point which is not included in the components of environment","choices":[{"text":"Stratosphere","value":"A"},{"text":"Hydrosphere","value":"B"},{"text":"Lithosphere","value":"C"},{"text":"Biosphere","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":127527,"question":"Lithosphere has amount of silicon","choices":[{"text":"35.30%","value":"A"},{"text":"27.72%","value":"B"},{"text":"40.01%","value":"C"},{"text":"21.13%","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":127526,"question":"Photo chemical smog contains ______ as main reactants","choices":[{"text":"Nitrons oxide and unburnt hydrocarbons","value":"A"},{"text":"Nilric oxide and unburnt hydrocarbons","value":"B"},{"text":"No and burnt hydrocarbons","value":"C"},{"text":"N<sub>2</sub>O and burnt hydrocarbons","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":127525,"question":"The concentration of dissolved molecular oxygen in water which acts as the most important oxidizing agent ranges from","choices":[{"text":"2 ppm - 6 ppm","value":"A"},{"text":"2 ppm - 4 ppm","value":"B"},{"text":"4 ppm - 8 ppm","value":"C"},{"text":"2 ppm - 3 ppm","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":127524,"question":"The cause of minamata disease is the pollution of","choices":[{"text":"Arsenic (As) into atomosphere","value":"A"},{"text":"Industrial waste having Hg","value":"B"},{"text":"Organic waste in drinking H<sub>2</sub>O","value":"C"},{"text":"Oil spills in H<sub>2</sub>O","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":127523,"question":"Oceans, rivers, streams, leaks, polar ice caps, glaciers and group water reservoirs are included in","choices":[{"text":"Atmosphere","value":"A"},{"text":"Lithosphere","value":"B"},{"text":"Hydrosphere","value":"C"},{"text":"Biosphere","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":127522,"question":"Surface and ground water sources are contaminated by various human activities. Which of the following is not a human activity that causes contamination in fresh water","choices":[{"text":"Rain","value":"A"},{"text":"Live stock waste","value":"B"},{"text":"Oil leaks and spills","value":"C"},{"text":"Disposal of industrial effluents","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":127521,"question":"CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destory","choices":[{"text":"50,000","value":"A"},{"text":"10,000","value":"B"},{"text":"20,000","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":127520,"question":"Which of the following waste material is not recycled for use again","choices":[{"text":"Glasses","value":"A"},{"text":"Paper","value":"B"},{"text":"Plastic toys","value":"C"},{"text":"Hides of animals","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":127519,"question":"Choose the chief air pollutant among the following which depletes ozone layer","choices":[{"text":"Carbon monoxide","value":"A"},{"text":"Carbon dioxide","value":"B"},{"text":"Chloroflurocarbons and nitrogen oxides","value":"C"},{"text":"Sulphur dioxide","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":127518,"question":"SO<sub>2</sub>and NO<sub>2</sub>cause pollution due to increase in","choices":[{"text":"Buffer action","value":"A"},{"text":"Basicity","value":"B"},{"text":"Acidity","value":"C"},{"text":"Neutrality","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":127515,"question":"Why is carbon monoxide called as pollutant? The reason is that","choices":[{"text":"It combines with oxygen","value":"A"},{"text":"It combines with haemoglobin","value":"B"},{"text":"It inactivates glycolysis","value":"C"},{"text":"It inactivates nerves","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":127506,"question":"Which is unnecessary for purification of water for drinking purposes","choices":[{"text":"Coagulation","value":"A"},{"text":"Aeration","value":"B"},{"text":"Treatment with Iodine","value":"C"},{"text":"Treatment with chlorine","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":127504,"question":"Which one of the following is not a component of environment","choices":[{"text":"Biosphere","value":"A"},{"text":"Stratosphere","value":"B"},{"text":"Hydrosphere","value":"C"},{"text":"Lithosphere","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":127502,"question":"Which factor is helping to reduce the environmental pollution","choices":[{"text":"Urbanization","value":"A"},{"text":"Industrialization","value":"B"},{"text":"Increase of plantation","value":"C"},{"text":"Rapid growth of population","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":127501,"question":"A single chlorine free radical can destory how many ozone molecules","choices":[{"text":"10","value":"A"},{"text":"100","value":"B"},{"text":"1000","value":"C"},{"text":"10000","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":127500,"question":"Newspapers can be recycled again and again by how many times","choices":[{"text":"5","value":"A"},{"text":"2","value":"B"},{"text":"4","value":"C"},{"text":"3","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":127498,"question":"Fungicides are the pesticides which","choices":[{"text":"Kill plants","value":"A"},{"text":"Kill herbs","value":"B"},{"text":"Kill insects","value":"C"},{"text":"Control the growth of fungus","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":127496,"question":"What is the effect of polluted air on environment","choices":[{"text":"Ozone","value":"A"},{"text":"Acid rain","value":"B"},{"text":"Global warming","value":"C"},{"text":"Smog","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":127495,"question":"The gases in the atmosphere are essential for sustaining life on earth. Thus oxygen is required for breathing. What for is carbon dioxide required","choices":[{"text":"To help plant to under go photosynthesis","value":"A"},{"text":"To destroy nitrogen oxide from the atmosphere","value":"B"},{"text":"To help to clean the atmosphere","value":"C"},{"text":"To help in fixing of bacteria","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":127492,"question":"In big/metropolitan cities, atmosphere is mostly polluted due to","choices":[{"text":"Radioactive fall out","value":"A"},{"text":"Household waste","value":"B"},{"text":"Pesticide residue","value":"C"},{"text":"Automobile exhausts","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":127489,"question":"The reason of acid rains is","choices":[{"text":"Release of CO in excess by in complete combustion","value":"A"},{"text":"Excess release of NO<sub>2</sub>and SO<sub>2</sub>from buring of fossil fules","value":"B"},{"text":"Formation of excess CO<sub>2</sub>due to combustion and respiration","value":"C"},{"text":"Formation of NH<sub>3</sub>in excess from industry and coal gas","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":127487,"question":"Cyclone collector is used to reduce","choices":[{"text":"Noise pollution","value":"A"},{"text":"Air pollution","value":"B"},{"text":"Water pollution","value":"C"},{"text":"Radioactive pollution","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":127485,"question":"The pH range of the acid rain is","choices":[{"text":"6.5 - 6","value":"A"},{"text":"Less than 5","value":"B"},{"text":"8 - 7.5","value":"C"},{"text":"7 - 6.5","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":127483,"question":"Proxy acetyl nitrate (PAN) is an irritant to human beings and it affect ","choices":[{"text":"Nose","value":"A"},{"text":"Stomach","value":"B"},{"text":"Eyes","value":"C"},{"text":"Ears","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":127481,"question":"Ecosystem is a smaller unity of","choices":[{"text":"Nydosphere","value":"A"},{"text":"Biosphere","value":"B"},{"text":"Lithosphere","value":"C"},{"text":"Attmosphere","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":127479,"question":"The temperature in the incineration of industrial and hazardons waster process had a range","choices":[{"text":"950 to 1300°C","value":"A"},{"text":"500 to 900°C","value":"B"},{"text":"250 to 500°C","value":"C"},{"text":"900 to 1000°C","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":127476,"question":"Choose the correct statements","choices":[{"text":"SO<sub>2</sub>affects the nucleus","value":"A"},{"text":"SO<sub>2</sub>affects plasmodesmata","value":"B"},{"text":"SO<sub>2</sub>affects cell wall","value":"C"},{"text":"SO<sub>2</sub>affects all membrane systems","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":127474,"question":"Which one of the pollutants of automobile exhausts affects the nervous system or produces mental diseases","choices":[{"text":"NO<sub>2</sub>","value":"A"},{"text":"SO<sub>2</sub>","value":"B"},{"text":"Hg","value":"C"},{"text":"Pb","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":127472,"question":"Which one of the following does not act as pollutant","choices":[{"text":"Carbon monoxide","value":"A"},{"text":"Sulphur dioxide","value":"B"},{"text":"Hydrocarbons","value":"C"},{"text":"Carbon dioxide","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":127470,"question":"Biochemical oxygen demand (BOD) is the capacity of organic matter in natural water to consume oxygen with in a period of","choices":[{"text":"2 day","value":"A"},{"text":"6 day","value":"B"},{"text":"5 day","value":"C"},{"text":"7 day","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":127467,"question":"The main pollution of leather tanneries in the waste is due to the salt of","choices":[{"text":"Chromium","value":"A"},{"text":"Copper","value":"B"},{"text":"Chromium","value":"C"},{"text":"Lead","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":127465,"question":"Potable water is considered to be","choices":[{"text":"Safe for human consumption","value":"A"},{"text":"The ground water","value":"B"},{"text":"The surface water","value":"C"},{"text":"Now safe for human consumption","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":127461,"question":"Steroids belong to the family of","choices":[{"text":"Protein","value":"A"},{"text":"Enzyme","value":"B"},{"text":"Lipids","value":"C"},{"text":"Carbohydrates","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":127460,"question":"In the body, carbohydrates are broken down into","choices":[{"text":"Glucose","value":"A"},{"text":"Fatty acids","value":"B"},{"text":"Amino acids","value":"C"},{"text":"Nucleic acid","value":"D"},{"value":"E"}],"correctAnswer":1}]