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PYQ 1200 Q/A Part - 1
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Kerala PSC General Science Book Study Materials Page 365
Book's First Page(d) ammonium persulphate Ans: (b) 56. Match the following: [NDA 1993] Process Changes A. Evaporation 1. Liquid into gas B. Sublimation 2. Gas into liquid C. Freezing 3. Solid into gas D. Melting 4. Solid into liquid 5. Liquid into solid A B C D (a) 1 2 4 3 (b) 3 1 2 4 (c) 2 1 4 3 (d) 2 1 3 4 Ans: (d) 57. Which of the following causes the rusting of iron? [NDA 1995] 1) Oxidation 2) Reduction 3) Chemical reaction with oxygen 4) Chemical reaction with CO2 (a) 1 and 2 (b) 2 and 3 (c) 3 and 4 (d) 1 and 3 Ans: (c) 58. Which of the following statements is/are true? [NDA 1994] 1) The process of oxidation leads to a gain of electrons. 2) The process of oxidation leads to a loss of electrons. 3) The process of reduction leads to a gain of electrons. 4) The process of reduction leads to a loss of electrons. (a) 1 only (b) 1 and 4 (c) 2 and 3 (d) 4 only Ans: (c) 59. Match the following: [IFS 1989] Process Materials obtained A. Hydrogenation 1. Vanaspati B. Evaporation 2. Ethyl alcohol 364