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PYQ 1200 Q/A Part - 1
PYQ 1200 Q/A Part - 2
PYQ 1200 Q/A Part - 3
PYQ 1200 Q/A Part - 4
PYQ 1200 Q/A Part - 5
Kerala PSC General Science Book Study Materials Page 409
Book's First Page300. Which of the toxic heavy metals is found in modern tannery industries? [CPO SI 2011] (a) Nickel (b) Zinc (c) Chromium (d) Lead Ans: (c) 301. Which of the following contains high content of lead? [CPO SI 2011] (a) Coal (b) Cooking gas (c) High octane fuel (d) Low octane fuel Ans: (c) 302. Cooking gas is a mixture of [CPO SI 2010] (a) methane and ethylene (b) carbon dioxide and oxygen (c) butane and propane (d) carbon monoxide and carbon dioxide Ans: (c) 303. Two elements which are used to absorb neutrons to control the chain reaction during nuclear fission are [CPO SI 2010] (a) Boron and Cadmium (b) Boron and Plutonium (c) Cadmium and Uranium (d) Uranium and Boron Ans: (a) 304. The most commonly used chemicals in the artificial rain making or cloud seeding are [CPO SI 2010] (a) Silver Iodide (Agl) (b) Sodium Chloride (NaCl) (c) Dry Ice (Frozen CO2) (d) All of the above Ans: (a) 305. Consider the following: 1) Carbon dioxide 2) Oxides of Nitrogen 3) Oxides of Sulphur Which of the above is/are the emission/emissions from coal combustion at thermal power plants? [CSAT 2011] (a) 1only (b) 2 and 3 only (c) 1 and 3 only (d) 1, 2 and 3 Ans: (d) 306. Silver ware turns black after a period of time due to formation of: [NDA 2011] (a) nitrate coating on silver . (b) sulphide coating on silver (c) chloride coating on silver 408