Download NEET-UG 2013 Answer Key (Code - X) - Bansal Classes

Q.9 Antiseptics and disinfectants either kill orprevent growth of microrganisms. Identifywhich of the following statements is not true :(1) Chlorine and Iodine are used as strongdisinfectants.(2)DilutesolutionsofBoricacidandHydrogenPeroxide are strong antiseptics.(3) Disinfectants harmthe livingtissues.(4)A0.2% solution of phenol is an antisepticwhich 1% solution acts as a disinfectant.Ans. 3Q.10 Nylon is an example of :(1) Polysaccharide (2) Polyamide(3) Polythene (4) PolyesterAns. 2Q.11 Among the following ethers, which one willproduce methyl alcohol treatment with hotconcentrated HI ?(1) CH(2) CH(3) CH333 CHC H||CH233 C H O CH|CH3 CO CH CH CH|CH323 O CH(4) CH 3–CH 2–CH 2–CH 2–O–CH 3Ans. 2Q.12 Which of these is not a monomer for a highmolecular mass silicone polymer ?(1) Me 2SiCl 2(2) Me 3SiCl(3) PhSiCl 3(4) MeSiCl 3Ans. 233Q.13 Identify the correct order of solubility inaqueousmedium :(1) Zns > Na 2S > CuS(2) Na 2S > CuS > ZnS(3) Na 2S > ZnS > CuS(4) CuS > ZnS > Na 2SAns. 3Q.14 What is the activation energy for a reaction ifits rate doubles when the temperature is raisedfrom 20ºC to 35ºC ? (R = 8.314 J mol –1 K –1 )(1) 269 kJ mol –1 (2) 34.7 kJ mol –1(3) 15.1 kJ mol –1 (4) 342 kJ mol –1Ans. 2Q.15 A hydrogen gas electrode is made by dippingplatinum wire in a solution of HCl of pH = 10and by passing hydrogen gas around theplatinumwireatoneatmpressure.Theoxidationpotential of electrode would be ?(1) 0.59 V (2) 0.118 V(3) 1.18 V (4) 0.059 VAns. 1Q.16 The value of Planck's constant is 6.63 × 10 –34Js. The speed of light is 3 × 10 17 nm s –1 .Whichvalue isclosest tothe wavelengthin nanometerof a quantum of light with frequency of6 × 10 15 s –1(1) 25 (2) 50(3) 75 (4) 10Ans. 2Q.17 What isthemaximm numbers ofelectrons thatcan be associated with the following set ofquantum numbers ?n = 3, l = 1 and m = –1(1) 6 (2) 4(3) 2 (4) 10Ans. 3