Institute for Competitive Examinations

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1 Pysics, emistry & Matetics (Paper-I) ode-5 IIT-JEE-1 PART II : EMISTRY ETIN- I (Single orrect Answer Type) Tis section contains 1 multiple coice questions. Eac question as four coices (A), (B), () and (D) out of wic NLY NE is correct 1. Te carboxyl functional group ( ) is present in (A) picric acid (B) barbituric acid () ascorbic acid (D) aspirin Sol: [D] aspirin 3 acetyl salicylic acid Institute for ompetitive Examinations. As per IUPA nomenclature, te name of te complex [o( ) 4 (N 3 ) ]l 3 is (A) Tetraaquadiaminecobalt(III)cloride () Diaminetetraaquacobalt(III)cloride Sol: [D] Diamminetetraaquacobalt(III)cloride 3. In allene ( 3 4 ), te type(s) of ybridisation of te carbon atoms is (are) Sol: [B] (B) Tetraaquadiamminecobalt(III)cloride (D) Diamminetetraaquacobalt(III)cloride (A) sp and sp 3 (B) sp and sp () only sp (D) sp and sp 3 sp sp sp 4. Te kinetic energy of an electron in te second Bor orbit of a ydrogen atom is [a is Bor radius] (A) 4 (B) 16 () 3 (D) 64 Sol: [] 1 Ze n K.E. and r r 4 mze n 4 mzr e So 1 z n K.E. r 4 mzr n 8 mr ere n = and r = a n K.E. 8 m(a 4) 3 Amity Institute for ompetitive Examinations : Pones: /44, //3/4, /4-9 -

2 Pysics, emistry & Matetics (Paper-I) ode-5 IIT-JEE-1 5. Wic ordering of compounds is according to te decreasing order of te oxidation state of nitrogen? (A) N 3, N, N 4 l, N (B) N 3, N, N, N 4 l () N 3, N 4 l, N, N (D) N, N 3, N 4 l, N Sol: [B] 5 3 N N N N l For one mole of a van der Waals gas wen b = and T = 3K, ten PV vs. 1/V plot is sown below. Te value of te van der Waals constant a (atm. liter mol ) is (A) 1. (B) 4.5 () 1.5 (D) 3. Institute for ompetitive Examinations Sol: [] an P (V nb) nrt V a P (V b) RT, V PV RT a V slope = a a PV RT V a, a a = Te number of aldol reaction(s) tat occurs in te given transfortion is 4 3 conc. aq.na (A) 1 (B) () 3 (D) 4 Amity Institute for ompetitive Examinations : Pones: /44, //3/4, /4-1 -

3 Pysics, emistry & Matetics (Paper-I) ode-5 IIT-JEE-1 Sol: [] (1) () (4) Step is cannizaro's reaction - Institute for ompetitive Examinations (3) 8. Te colour of ligt absorbed by an aqueous solution of us 4 is (A) orange-red (B) blue-green () yellow (D) violet Sol: [A] omplementary colour of blue green is orange red. 9. Te number of optically active products obtained from te complete ozonolysis of te given compound is (A) (B) 1 () (D) 4 Sol: [A] Amity Institute for ompetitive Examinations : Pones: /44, //3/4, /4-11 -

4 Pysics, emistry & Matetics (Paper-I) ode-5 3. A compound M p X q as cubic close packing (ccp) arrangement of X. Its unit cell structure is sown below. Te empirical formula of te compound is IIT-JEE-1 M = X = (A) MX (B) MX () M X (D) M 5 X 14 Sol: [B] Number of X = 4 Number of M = M present in body centre = 1 M X 4 = MX 1 M present in edge centre SETIN- II: (Multiple orrect Answer Type) Tis section contains 5 multiple coice questions. Eac question as four coices (A), (B), () and (D) out of wic NE R MRE y be correct. Institute for ompetitive Examinations 31. Wic of te following ydrogen alides react(s) wit AgN 3 (aq) to give a precipitate tat dissolves in Na S 3 (aq)? (A) l (B) F () Br (D) I Sol: [A,, D] AgF soluble Agl wite ppt. AgBr yellow ppt. AgI dark yellow ppt. NaS3 Na S 3 Agl Na 3[Ag(S 3) ] Nal Na S 3 AgBr Na 3[Ag(S 3) ] NaBr Na S 3 AgI Na 3[Ag(S 3) ] NaI 3. Identify te binary mixture(s) tat can be separated into individual compounds by differential extraction, as sown in te given sceme. Na (aq) ompound 1 ompound Binary mixture containing ompound 1 and ompound Na 3 (aq) ompound 1 ompound (A) 6 5 and 6 5 () 6 5 and 6 5 (B) 6 5 and 6 5 (D) 6 5 and 6 5 3ol: [B, D] (B) 6 5 reacts wit Na (aq) wile 6 5 does not react wit Na (aq). (D) 6 5 reacts wit Na 3 wile 6 5 does not react wit Na 3 (aq). Amity Institute for ompetitive Examinations : Pones: /44, //3/4, /4-1 -

5 Pysics, emistry & Matetics (Paper-I) ode-5 IIT-JEE For an ideal gas, consider only P-V work in going from an initial state X to te final state Z. Te final state Z can be reaced by eiter of te two pats sown in te figure. Wic of te following coice(s) is(are) correct? [take S cange in entropy and w as work done] S S S (A) xz xy yz w w w (B) xz xy yz w w () xyz xy S S (D) xyz xy Sol: [A, ] S is state function work done is pat function w y z = (volume constant) 34. Wic of te following molecules, in pure form, is (are) unstable at room temperature? Institute for ompetitive Examinations (A) (B) () Sol: [B, ] Bot are antiarotic and ence unstable. A is non-arotic, D is arotic 35. oose te correct reason(s) for te stability of te lyopobic colloidal particles. (A) Preferential adsorption of ions on teir surface from te solution (B) Preferential adsorption of solvent on teir surface from te solution () Attraction between different particles aving opposite carges on teir surface (D) Potential difference between te fixed layer and te diffused layer of opposite carges around te colloidal particles. (D) Sol: [A, D] Self explanatory SETIN- III: (Integer Answer Type) Tis Section contains 5 questions. Te answer to eac of te question is a single digit integer, ranging from to 9 (bot inclusive) % (w/w) l stock solution as a density of 1.5 g ml 1. Te molecular weigt of l is 36.5 g mol 1. Te volume (ml) of stock solution required to prepare a ml solution of.4 M l is Amity Institute for ompetitive Examinations : Pones: /44, //3/4, /4-13 -

6 Pysics, emistry & Matetics (Paper-I) ode-5 IIT-JEE-1 Sol. [8] Molarity of 9.% w/w l solution (density 1.5 g/cc) is 1 M M 1 V 1 = M V 1 V =.4 V = 8 ml 37. Te substituents R 1 and R for nine peptides are listed in te table given below. ow ny of tese peptides are positively carged at p = 7.? + 3 N N R 1 N R N - Peptide R 1 R I II 3 Institute for ompetitive Examinations III IV N ( ) 4 N V N N VI ( ) 4 N ( ) 4 N VII N VIII ( ) 4 N IX ( ) 4 N 3 Sol. [4] Peptide IV, VI, VIII and IX gives positive carge peptide at p = An organic compound undergoes first-order decomposition. Te time taken for its decomposition to [t ] 1/8 and 1/1 of its initial concentration are t 1/8 and t 1/1 respectively. Wat is te value of (take log 1 =.3) 1/ 8 [t 1/1 ] 1? Sol. [9] t t 1/ 8 1/1 log log1 39. Wen te following aldoexose exists in its D-configuration, te total number of stereoisomers in its pyranose from is Amity Institute for ompetitive Examinations : Pones: /44, //3/4, /4-14 -

7 Pysics, emistry & Matetics (Paper-I) ode-5 IIT-JEE-1 Sol. [8] Total number of stereoisomers is equal to 8. Institute for ompetitive Examinations 4. Te periodic table consists of 18 groups. An isotope of copper, on bombardment wit protons, undergoes a nuclear reaction yielding element X as sown below. To wic group, element X belongs in te periodic table? u 6 n X Sol. [8] u 6 n e X X is Fe and belongs to 8 group of periodic table. Amity Institute for ompetitive Examinations : Pones: /44, //3/4, /4-15 -