JEE MAIN SOLUTION. (From equ. (i)

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Abraham Parrish
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volume for complete combustion. After combustion the gases occupy 330 ml.

formula of the hydrocarbon is: (a) C 3 H 6 (b) C 3 H 8 (c) C 4 H 8 (d) C 4 H 0 3.

Two closed bulbs of equal volume (V) containing an ideal gas initially at pressure p

shown in the figure below. The temperature of one of the bulbs is then raised to T.

i 3. (c) From the given diagram P I (v ) = ( n)rt = n R T P I V = n R T (i) P F V =

(ii) V V = n + n RT RT V V + = n RT RT V + = n = R T T T P F = p i PV I RT (From equ.

A stream if electrons from a heated filament was passed between two charged plates

1 JEE MAIN SOLUTION 3. At 300K and atm, 5 ml of a gaseous hydrocarbon requires 375mL air containing 0% O by volume for complete combustion. After combustion the gases occupy 330 ml. Assuming that the water were measured at the same temperature and pressure, the formula of the hydrocarbon is: (a) C 3 H 6 (b) C 3 H 8 (c) C 4 H 8 (d) C 4 H 0 3. Question is incorrect 3. Two closed bulbs of equal volume (V) containing an ideal gas initially at pressure p i and temperature T are connected through a narrow tube of negligible volume as shown in the figure below. The temperature of one of the bulbs is then raised to T. The final pressure p f is: T T T T pi,v p i,v Pf,V P f,v TT T T (a) pi (b) p i (c) p i 3. (c) From the given diagram P I (v ) = ( n)rt = n R T P I V = n R T (i) P F V = (n x) RT (ii) P F V = (n + x )RT (iii) V x = n RT Put the value of x in equ. (ii) V V = n + n RT RT V V + = n RT RT V + = n = R T T T P F = p i PV I RT (From equ. (i) (d) TT i p T 33. A stream if electrons from a heated filament was passed between two charged plates kept at a potential difference V esu. If e and m are charge and mass of an electron, respectively, then the value of h/λ (where λ is wavelength associated with electron wave) is given by: (a) mev (b) mev (c) mev (d) mev 33. (d) De Broglie equation h λ = (i) mv Q KE = mv mv = m. KE KE = ev mv = mev

2 Put in equation (i) h mev λ = 34. The species in which the N atom is in a state of sp hybridization is: (a) NO + (b) NO (c) NO 3 (d) NO 34. (a) 35. The heats of combustion of carbon and carbon monoxide are and 83.5 kj mol respectively. The heat of formation (in kj) of carbon monoxide per mole is: (a) 0.5 (b) (c) (d) (d) C + O CO H = CO + O CO H = 83.5 Heat of formation of CO = H H = 0.0 kj g glucose (C 6 H O 6 ) is added to 78. g water. The vapour pressure of water (in torr) for this aqueous solution is: (a) 7.6 (b) 76.0 (c) 75.4 (d) (c) 0 P P S 0 P = mole fraction of glucose Insufficient data (Assuming P 0 = 760 mm) No of moles of glucose = 0. No. of moles of water = 9.9 Mole fraction of glucose = 0. /0 P s = 75.4 mm 37. The equilibrium constant at 98K for a reaction A + B C + D is 00. If the initial concentration of D (in mol L ) will be: (a) 0.8 (b) 0.88 (c).88 (d) (c) A + B C + D x x + x + x + x = 00 x x = 0.88 [D]= Galvanization is applying a coating of: (a) Pb (b) Cr (c) Cu (d) Zn 38. (d) 39. Decomposition of H O follows a first order reaction. In fifty minute the concentration of H O decreases from 0.5 to 0.5 M in one such decomposition. When the concentration of H O reaches 0.05 M, the rate of formation of O will be: (a) mol min (b) mol min (c).66 L min at STP (d).34 0 mol min 39. (b) Since concentration of H O decreases from 0.5M to 0.5M in 50 min. Therefore half life will be = 5 min.

3 k = r = k [H O ] r = Now rate of formation of O = / rate of decomposition of H O = / = mol min 40. For a linear plot of log(x/m) versus log p in a Freundich adsorption isotherm, which of the following statements is correct? (k and n are constant) (a) Both k and /n appear in the slope term. (b) /n appears as the intercept. (c) Only /n appears as the slope (d) log(/n) appears as the intercept. 40. (c) x /n Hint: P m = 4. Which of the following atoms has the highest first ionization energy? (a) Rb (b) Na (c) K (d) Sc 4. (d) Sc = [Ar] 4s 3d. 4. Which one of the following ores is best concentrated by forth flotation method? (a) Magnetite (b) Siderite (c) Galena (d) Malachite 4. (c) Hint: Galena is PbS 43. Which one of the following statements about water is FALSE? (a) Water is oxidized to oxygen during photosynthesis. (b) Water can act both as an acid and as a base. (c) There is extensive intramolecular hydrogen bonding in the condensed phase. (d) Ice formed by heavy water sinks in normal water. 43. (c) 44. The main oxides formed on combustion Li, Na and K in excess of air are, respectively: (a) Li O, Na O and KO (b) LiO, Na O and K O (c) Li O, Na O and KO (d) Li O, Na O and KO 44. (d) 45. The reaction of zinc with dilute and concentrated nitric acid, respectively, produces: (a) N O and NO (b) NO and NO (c) NO and N O (d) NO and N O 45. (a) 46. The pair in which phosphorous atoms have a formal oxidation state of +3 is: (a) Orthophosphorous and pyrophosphorous acids (b) Pyrophosphorous and hypophosphorous acids (c) Orthophosphorous and hypophosphorous acids (d) Pyrophosphorous and Pyrophosphoric acids 46. (a) Orthophosphorous acid = H 3 PO 3 Pyrophosphorous acid = H 4 P O 5 Pyrophosphoric acid = H 4 P O 7 Hypophosphoric acid = H 4 P O 6

4 47. Which of the following compounds is metallic and ferromagnetic? (a) TiO (b) CrO (c) VO (d) MnO 47. (b) 48. The pair having the same magnetic moment is: [At. No.: Cr = 4, Mn = 5, Fe = 6, Co = 7] (a) [Cr(H O) 6 ] + and [Co 4 ] (b) [Cr(H O) 6 ] + and [Fe(H O) 6 ] + (c) [Mn(H O) 6 ] + and [Cr(H O) 6 ] + (d) [Co 4 ] and [Fe(H O) 6 ] (b) Mn + = 3d 5 4s 0 Cr + = 3d 4 4s 0 Co + = 3d 7 4s 0 Fe + = 3d 6 4s 0 Hence No. of unpaired electrons in [Cr(H O) 6 ] + and [Fe(H O) 6 ] + both will be Which one of the following complexes shows optical isomerism? (en = ethylenediamine) (a) [Co(NH 3 ) 3 3 ] (b) cis[co(en) ] (c) trans[co(en) ] (d) [Co(NH 3 ) 4 ] 49. (b) cis[co(en) ] will exist in forms enantiomeric pair d- and l-pair 50. The concentration of fluoride, lead, nitrate and iron in a water sample from an underground lake was found to be 000 ppb, 40ppb, 00ppm and 0.ppm, respectively. This water is unsuitable for drinking due to high concentration of: (a) Fluoride (b) Lead (c) Nitrate (d) Iron 50. (c) Concentration of nitrate is maximum. 5. The distillation technique most suited for separating glycerol from spent-lye in the soap industry is: (a) Simple distillation (b) Fractional distillation (c) Steam distillation (d) Distillation under reduced pressure 5. (d) 5. The product of the reaction given below is:. NBS / hv X. HO / KCO3 5. (c) (a) (b) (c) (d) NBS

5 Now the given intermediate will produce on reaction with H O / K CO The absolute configuration of is (a) (R, 3S) (b) (S, 3R) (c) (S, 3S) (d) (R, 3R) 53. (b) 54. -chloro--methylpentane on reaction with sodium methoxide in methanol yields: CH5CH C CH CH5CH = C. CH5CH C O. 3. (a) All of these (b) (a) and (c) (c) (c) only (d) (a) and (b) 54. (a) Compound () will be formed as a substitution (Nucleophilic ) product while compound ( ) & (3) will be elimination product. 55. The reaction of propene with HO ( + H O) proceeds through the intermediate: (a) CH 3 CH + CH OH (b) CH 3 CH + CH + (c) CH 3 CH(OH) CH 55. (b) The primary attacking species is +.. (d) CH 3 CH CH In the Hofmann bromamide degradation reaction, the number of moles of NaOH and Br used per mole of amine produced are: (a) One mole of NaOH and one mole of Br. (b) Four moles of NaOH and two moles of Br. (c) Two moles of NaOH and two moles of Br (d) Four moles of NaOH and one mole of Br 56. (d) RCONH + Br + 4 NaOH R NH + NaBr + Na CO 3 + H O 57. Which of the following statements about low density polythene is FALSE? (a) Its synthesis requires high pressure. (b) It is a poor conductor of electricity (c) Its synthesis requires dioxygen or a peroxide initiator as a catalyst (d) It is used in the manufacture of buckets, dust-bins etc. 58. Thiol group is present in: (a) Cytosine (b) Cystine (c) Cysteine (d) Methionine 58. (c) Cysteine Structure 59. Which of the following is an anionic detergent?

6 (a) Sodium stearate (c) Cetyltrimethyl ammonium bromide 59. (b) (b) Sodium lauryl sulphate (d) Glycerol oleate 60. The hottest region of Bunsen flame shown in the figure below is: region 4 region 3 region region (a) region (b) region (c) region 3 (d) region (b)

Joint Entrance Exam/IITJEE-2016 Paper Code - F

Joint Entrance Exam/IITJEE-2016 Paper Code - F Joint Entrance Exam/IITJEE-06 Paper Code - F rd April 06 9.0 AM.0 PM CHMISTRY, MATHEMATICS & PHYSICS Important Instructions:. Immediately fill in the particulars on this page of Test Booklet with only