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Ayan Rana
South Point High School (SPHS), Kolkata

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CODE-F AIPMT 2015 TEST PAPER WITH SOLUTIONS (HELD ON SUNDAY 03th MAY, 2015) 1. The reaction of C6H5CH = CHCH 3 with HBr produces:(1) C6H5CH 2CHCH3 (2) C6H5CH2CH2CH2Br Br CH=CHCH3 (3) (4) C6H 5CHCH2CH3 3. The Ksp of Ag2CrO 4, AgCl, AgBr and AgI are respectively, 1.1 10 12, 1.8 10 10, 5.0 10 13, 8.3 10 17. Which one of the following salts will precipitate last if AgNO3 solution is added to the solution containing equal moles of NaCl, NaBr, NaI and Na2CrO4 ? (1) AgCl (2) AgBr (3) Ag2CrO4 (4) AgI Ans. (3) Sol. Br Br Ag+ = Ans. (4) CrO -2 4 = 1.1 10-12 = maxm -2 CrO4 CH CH CH EN C6H5 4. Bithional is generally added to the soaps as an additive to function as a/an :(1) Dryer (2) Buffering agent (4) Softner (3) Antiseptic Ans. (3) Sol. Bithionol (the compound is also called bithional) is added to soaps to impart antiseptic properties CH3+HBr CH2 CH3 Br CH CH2 CH3 LL C6H5 Br A In Duma's method for estimation of nitrogen, 0.25 g of an organic compound gave 40 mL of nitrogen collected at 300 K temperature and 725 mm pressure. If the aqueous tension at 300 K is 25 mm, the percentage of nitrogen in the compound is :(1) 18.20 (2) 16.76 (3) 15.76 (4) 17.36 Ans. (2) Sol. Volume of nitrogen collected at 300 K and 725 mm pressure is 40 mL actual pressure = 725 25 = 700 mm 273 700 40 = 33.52mL = 300 760 22,400 mL of N2 at STP weight = 28 g 33.5 mL of nitrogen weight = Percentage of nitrogen 28 33.52 100 = 16.76% 22400 0.25 5. Cl OH HO Cl S Cl Cl Bithionol "Metals are usually not found as nitrates in their ores". Out of the following two (a and b) reasons which is/are true for the above observation ? (a) Metal nitrates are highly unstable. Volume of nitrogen at STP = K sp so answer is Ag2CrO4 Sol. C H 6 5 2. 2 -2 Ag + CrO4 Ag2 CrO 4 K sp = 28 33.52 g 22400 (b) Metal nitrates are highly soluble in water. (1) a and b are false (2) a is false but b is true (3) a is true but b is false (4) a and b are true Ans. (2) Sol. Metal nitrates are stable like NaNO3 and KNO3 and highly soluble in water. 1

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