Class: Target IIT-JEE 2017

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1 ass: Target IIT-JEE 2017 PPER 1 ( ) Section (Single Correct) egative Marking [-1] This Section contains 5 multiple choice questions. Each question has four choices ), ), C) and D) out of which LY E is correct. 1. The compounds of sulphur obtained by reaction of sulphur and conc. hot a are a. a 2 S & a 2 S 2 3 b. a 2 S 4, a 2 S c. a 2 S 4 6, a 2 S d. a 2 S 2 3, a 2 S 3 2. Compound M on heating leaves no residue and 2 is also not obtained. queous solution of M reacts with alkali and an alkaline gas is evolved. The resulting solution is treated with l in alkaline medium to liberate same gas that produces a deep blue solution with Cu( 3 ) 2 solution. M is a. 4 3 b. 4 2 c. 4 d. 4 r ion on Reduction give 3 4 ion with alkali give 3 3. oth chlorine and bromine can be produced in the laboratory by reacting the halides with manganese (IV) oxide. If the following equation is balanced in an acidic solution, then the Mn 2 is acting as and the coefficient in front of + is Mn 2 (s) + - (aq) + + (aq) Mn 2+ (aq) + 2 (g) + 2 (l) a. oxidizing agent, 2 b. oxidizing agent, 3 c. oxidizing agent, 4 d. reducing agent, 3 C 4. Compounds and are treated with dil. separately. The gases liberated are Y and Z respectively. Y turns acidified dichromate paper green while Z turns lead acetate paper black. The compounds and are respectively: a. a 2 S 3 and a 2 S b. a and a 2 C 3 c. a 2 S and a 2 S 3 d. a 2 S 3 and a 2 S 4 dil. cid dil. cid a 2S3 S2 a 2S 2S 5. emiacetals are usually unstable whereas acetals are stable. Which has the most stable hemiacetal? a. b. C 6 5 C c. C 3 C C 2 C 3 d. D If a hemiacetal is five or six membered cyclic. They are stable. Coordinated by: Dr. Sangeeta Khanna, Ph.D (Chemistry),.P. Singh (Maths), Shiv. R. Goel (Physics) 1

2 ass: Target IIT-JEE 2017 SECTI (More than ne nswer Type) o egative Marking This Section contains 5 multiple choice questions. Each question has four choices ), ), C) and D) out of which ne or More than one answer may be correct. 5 5 = Which of the following is(are) correctly matched? a. Copper-essemer converter b. Iron last furnance c. Chromium luminothermic process d. Tin Electroytic reduction,,c () Self reduction takes place in essemer converter. () Slag formation & reduction of haematite to iron take place in blast furnance at different temperatures. (C) Cr l l Cr. This is called aluminothermic process. (D) Tin is obtained by carbon reduction of Sn 2 (cassiterite ore) 2. Which of the following is/are true? a. mong halide ions, iodide ion is the most powerful reducing agent b. luorine is the only halogen which does not show a variable oxidation state c. is a stronger acid than r d. 4 Xe 6 can oxidise to 2,,C,D 3. In the reaction given below + 2 Conc. 2S 4 X Expected product(s) is/are: a. b. c. d.,c eckmann s Rearrangement + 4. The complex [e( 2 ) 5 ] +2 is formed in the brown ring test for nitrates when freshly prepared es 4 solution is added to aq. Solution of 3 followed by addition of Conc. 2 S 4. Select correct statement about this complex. a. Colour change is due to charge transfer b. Its iron is in +1 oxidation state and nitrosyl as + c. Its magnetic moment 3.87 M confirm 3 unpaired e in e d. e is present in +2 state,,c e is present in +1 oxidation state Dr. Sangeeta Khanna Ph.D 2 CEMISTRY CCIG CIRCLE

3 5. ow many of the following pair are stronger than benzoic acid ass: Target IIT-JEE 2017 (a) C, C 3 C, C C 2 C C C (b) C 3 S C (c) C 2 C (d) C 2 C C C,D SECTI C (Paragraph Type) egative Marking [-1] This Section contains 6 questions. Each of these questions has four choices ), ), C) and D) out of which LY E is correct. Comprehension 1 Go through the following graph and answer the following questions. G /kj mol 1 of e + 2 2e 2Zn + 2 2Zn 4Cu + 2 2Cu 2 4/3l + 2 2/3l 2 3 2Mg + 2 2Mg 2C + 2 2C C + 2 C 2 0 C 400 C 800 C 1200 C 1600 C 2000 C Temperature Dr. Sangeeta Khanna Ph.D 3 CEMISTRY CCIG CIRCLE

4 ass: Target IIT-JEE t what approximate temperature, zinc and carbon have equal affinity for oxygen. a. 900 C b C c. 500 C d C t about 1000 C, lines cross and thus at this temperature zinc and carbon have equal affinity for oxygen 2. To make the following reduction process spontaneous, temperature should be: 3Mg + 2l l Mg a. < 1000 C b. > 1200 C c. < 500 C d. > 500 but < 1200 C This will be above a temperature when two curves intersect that is > 1200 C. 3. Which of the following statement is incorrect? a. Reduction of calcined / roasted haematite ore to pig iron in blast furnace takes place in the lower temperature range and in the higher temperature range by C and C respectively. b. The reduction of zinc oxide using coke takes place at higher temperature than that in case of copper c. It is quite easy to reduce oxide ores of copper directly to the metal by heating with coke after K d. C can act as a Reducing agent at high temperature. D ll other statements are true Comprehension -2 neutral organic compound (C ) neither reduces Tollen s reagent nor forms precipitate with 2, 4-dinitrophenyl hydrazine, but can be resolved into enantiomers. on acid hydrolysis forms two compounds and C, both are chiral. C neither reduces ehling s solution nor forms iodoform with alkaline iodine solution. C on oxidation with Cr 3 //pyridine forms D which is still resolvable into enantiomers. D on further treatment with aqueous (R) 3 l solution gives back and on oxidation D give. 4. ow many different stereoisomers exist for? a. 2 b. 4 c. 5 d. 6 C 3 C 3 C 3 C 2 C C C 2 C C 2 C 3 () C 3 C 3 C 3 C 2 C C + C 3 C 2 C C 2 () (C) PCC xidation C 3 C 3 C 2 C 2 C C (D) Tishenko Reaction C 3 C 2 C CC 2 C C 2C 3 ester The above ester has two chiral carbons and no symmetry hence, four stereoisomers. C 3 Dr. Sangeeta Khanna Ph.D 4 CEMISTRY CCIG CIRCLE

5 5. What is true regarding D? ass: Target IIT-JEE 2017 a. It forms a yellow precipitate with K/I 2 b. It forms an orange precipitate with 2, 4 dinitrophenyl hydrazine c. D is less reactive in aldol condensation & give cannizzaro Reaction inspite of having -hydrogen d. n treatment with as 3, it forms salt which cannot be separated by fractional crystallization C Due to formation of less stable carbanion ldol Reaction is slow 6. The correct statement regarding the following reaction is: D S chlorination a. Product is achiral b. Product is a racemic mixture c. Product is a pair of diastereomer d. o - halogenation occur with D D C 3 C 3C 2 C C (Racemic) SECTI D (Integer Type) o egative Marking This Section contains 5 questions. The answer to each question is a single digit integer ranging from 0 to What is the co-ordination number of metals in alums. Six In alums every metal is surrounded by six 2 molecules. 24 water for 4 metal ion 2. ow many isomeric ketones can be formulated by C 6 12? 7 C 3 C C 2 C 2 C 2 C 3 C3 C 2 C C 2 C 2 C3 C3 C3 C 3 C C C 2 C 3 (d ) C 3 C C 2 C C 3 C3 C3 C 3 C C C 3 C 3 C 2 C C C 3 C 3 3. C 2C 3 x C 3MgI + C(C 3) 2 C 2C 3 C(C 3) 2 umber of moles (x) of Grignard reagent consumed in the above reaction is: 4 4. In the Lewis structure for the r 4 - ion, how many lone pairs of electrons are placed around the central atom? 2 it is sp 3 d 2 r 5. Iodate ions ( I3 ) can be reduced to iodine by iodide ions in acidic medium ow many moles of iodine are produced for every mole of iodate ions consumed in the reaction? 3 5I - + I I Dr. Sangeeta Khanna Ph.D 5 CEMISTRY CCIG CIRCLE