May 2011 - Career Point
May 2011 - Career Point May 2011 - Career Point
XtraEdge for IIT-JEE 80 MAY 2011
IIT-JEE 2011PAPER-II (PAPER & SOLUTION)Time : 3 Hours Total Marks : 240Instructions : [Each subject contain]Section – I :Section – II :Multiple choice questions with only one correct answer. +3 marks will be awarded for correct answerand -1 mark for wrong answer. [No. of Ques. : 8]Multiple choice questions with multiple correct answer. +4 marks will be awarded for correct answerand No Negative marking for wrong answer. [No. of Ques. : 4]Section – III : Numerical Response Question (single digit Ans. type) +4 marks will be awarded for correct answerand No Negative marking for wrong answer. [No. of Ques. : 6]Section – IV : Column Matching type question +2 marks for each correctly matched row and No Negative markingfor wrong answer. [No. of Ques. : 2]CHEMISTRYSECTION – ISingle Correct Choice TypeThis section contains 8 multiple choice questions. Eachquestion has 4 choices (A), (B), (C) and (D), out ofwhich ONLY ONE is correct.1. Oxidation states of the metal in the mineralshaematite and magnetite respectively, are(A) II, III in haematile and III in magnetite(B) II, III in haematite and II in magnetite(C) II in haematite and II, III in magnetite(D) III in haematite and II, III in magnetiteAns. [D]+ 3Sol. Haematite is F e2O3+ 2+ 3Magnetite is Fe 3 O 4 or FeO. Fe2O32. The following carbohydrate isH OHH OHOHOOHH OHH H(A) a ketohexose (B) an aldohexose(C) an α-furanose (D) an α-pyranoseAns. [B]Sol. Aldohexose3. The major product of the following reaction isRCH 2 OHH + (anhydrous)O(A) a hemiacetal (B) an acetal(C) an ether(D) an esterAns.Sol.[B]OR- CH 2 –OH⊕H (anhydrous)OOCH 2 –RAcetal4. Amongst the compounds given, the one thatwould form a brilliant colored dye on treatmentwith NaNO 2 in dill. HCl followed by addition toan alkaline solution of β -naphthol isN(CH 3 ) 2NHCH 3(A)(B)Ans.Sol.(C)[C]H 3 CNH 2(D)NaNO 2 + HCl (dil.)CH 3 NH 2 CH 30–5°CCH 3Alkaline solutionN = NHOColoured dyeCH 2 NH 2N 2 ClOH5. The freezing point (in °C) of a solution containing0.1 g of K 3 [Fe(CN) 6 ] (mol. wt. 329) in 100 g ofwater (k f = 1.86 K kg mol –1 ) is(A) –2.3 × 10 –2 (B) –5.7 × 10 –2(C) –5.7 × 10 –3 (D) –1.2 × 10 –2XtraEdge for IIT-JEE 81 MAY 2011
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IIT-JEE <strong>2011</strong>PAPER-II (PAPER & SOLUTION)Time : 3 Hours Total Marks : 240Instructions : [Each subject contain]Section – I :Section – II :Multiple choice questions with only one correct answer. +3 marks will be awarded for correct answerand -1 mark for wrong answer. [No. of Ques. : 8]Multiple choice questions with multiple correct answer. +4 marks will be awarded for correct answerand No Negative marking for wrong answer. [No. of Ques. : 4]Section – III : Numerical Response Question (single digit Ans. type) +4 marks will be awarded for correct answerand No Negative marking for wrong answer. [No. of Ques. : 6]Section – IV : Column Matching type question +2 marks for each correctly matched row and No Negative markingfor wrong answer. [No. of Ques. : 2]CHEMISTRYSECTION – ISingle Correct Choice TypeThis section contains 8 multiple choice questions. Eachquestion has 4 choices (A), (B), (C) and (D), out ofwhich ONLY ONE is correct.1. Oxidation states of the metal in the mineralshaematite and magnetite respectively, are(A) II, III in haematile and III in magnetite(B) II, III in haematite and II in magnetite(C) II in haematite and II, III in magnetite(D) III in haematite and II, III in magnetiteAns. [D]+ 3Sol. Haematite is F e2O3+ 2+ 3Magnetite is Fe 3 O 4 or FeO. Fe2O32. The following carbohydrate isH OHH OHOHOOHH OHH H(A) a ketohexose (B) an aldohexose(C) an α-furanose (D) an α-pyranoseAns. [B]Sol. Aldohexose3. The major product of the following reaction isRCH 2 OHH + (anhydrous)O(A) a hemiacetal (B) an acetal(C) an ether(D) an esterAns.Sol.[B]OR- CH 2 –OH⊕H (anhydrous)OOCH 2 –RAcetal4. Amongst the compounds given, the one thatwould form a brilliant colored dye on treatmentwith NaNO 2 in dill. HCl followed by addition toan alkaline solution of β -naphthol isN(CH 3 ) 2NHCH 3(A)(B)Ans.Sol.(C)[C]H 3 CNH 2(D)NaNO 2 + HCl (dil.)CH 3 NH 2 CH 30–5°CCH 3Alkaline solutionN = NHOColoured dyeCH 2 NH 2N 2 ClOH5. The freezing point (in °C) of a solution containing0.1 g of K 3 [Fe(CN) 6 ] (mol. wt. 329) in 100 g ofwater (k f = 1.86 K kg mol –1 ) is(A) –2.3 × 10 –2 (B) –5.7 × 10 –2(C) –5.7 × 10 –3 (D) –1.2 × 10 –2XtraEdge for IIT-JEE 81 MAY <strong>2011</strong>
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