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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 375
Book's First Page(d) 1, 3 and 4 Ans: (c) 99. An acid used to remove inkspots is: (a) oxalic acid (b) butyric acid (c) lactic acid (d) tartaric acid Ans: (a) 100. Two solutions are isotonic when they: (a) are of the same concentration (b) have the same osmotic pressure (c) have the same number of isotopes (d) have the same substance saturating them Ans: (b) 101. Tile noble gases do not react with any other atom because: (a) they are heavy elements (b) they are stable compounds (c) their outermost orbits contain eight electrons (d) None of the above Ans: (c) 102. Dialysis is used for people with defective kidneys, It involves the process of: (a) adsorption (b) osmosis (c) electropheresis (d) diffusion Ans: (b) 103. Which of the following compounds are responsible for "acid rain" ? 1) Nitrogen dioxide 2) Silicon dioxide 3) Sulphur dioxide 4) Carbon monoxide (a) 1 and 2 (b) 1 and 3 (c) 2 and 4 (d) 3 and 4 Ans: (b) 104. The substance coated on plastic tape-recorder tapes is : (a) zinc oxide (b) manganse oxide (c) iron sulphate (d) iron oxide Ans: (d) 105. In addition to the idea that matter consists of molecules, the kinetic theory of matter assumes that these molecules: (a) are perfectly stationary in solids 374