JEE Main C CHEMISTRY CO 3. ) on treatment with excess HCl produces mole of CO gram of a carbonate (M 2

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1 61. 1 gram of a carbonate (M C ) on treatment with excess H produces mole of C. The molar mass of M C in g mol 1 is : 84. () () given C ( g) C ( g); ( graphite) 9.5 kj mol 1 1 H ( g) ( g) H ( l); 85.8 kj mol 1 C ( g) H ( l) CH ( g) ( g); kj mol 1 Based on the above thermochemical equations, the value of H r at 98 K for the reaction C H ( g) CH ( g) will be : ( graphite) kj mol 1 () 74.8 kj mol 1 () kj mol kj mol 1 () 74.8 kj mol 1 6. The freezing point of benzene decreases by 0.45C when 0. g of acetic acid is added to 0 g of benzene. If acetic acid associates to form a dimer in benzene percentage association of acetic acid in benzene will be : (K f for benzene = 5.1 K kig mol 1 ) 80.4 % () 74.6% () 94.6% 64.6% () 94.6% 64. The most abundant elements by mass in the body of a healthy human adult are : xygen (61.4%); Carbon (.9%), Hydrogen (10.0%); and Nitrogen (.6%). The weight which a 75 kg person would gain if all 1 H atoms CHEMISTRY JEE Main-017 are replaced by H atoms is : 7.5 kg () 7.5 kg () 10 kg 15 kg () 7.5 kg 65. U is equal to : Isobaric work () Adiabatic work () Isothermal work Isochoric work () Adiabatic work 66. The formation of which of the following polymers involves hydrolysis reaction? Bakelite () Nylon 6, 6 () Terylene Nylon 6 Nylon Given E 1.6 V, E 0.74V / Cr / Cr E 1. V, E 1.51 V. Cr7 / Cr Mn4 / Mn Among the following, the strongest reducing agent is : Mn + () Cr + () Cr () Cr The Tyndall effect is observed only when following conditions are satisfied : (a) The diameter of the dispersed particles is much smaller than the wavelength of the light used. (b) The diameter of the dispersed particle is not much smaller than the wavelength of the light used. (c) The refractive indices of the dispersed phase and dispersion medium are almost similar in magnitude. (d) The refractive indices of the dispersed phase and dispersion medium differ greatly in magnitude. (b) and (d) () (a) and (c) () (b) and (c) (a) and (d) 1- Anasagar Circular Road, pp. Chaupati, Ajmer

2 (b) and (d) 69. In the following reactions, Zn is respectively acting as a/an: JEE Main The major product obtained in the following reaction is : (a) Zn Na NaZn (b) Zn C ZnC base and base () acid and acid () acid and base base and acid () acid and base 70. Which of the following compounds will behave as a reducing sugar in an aqueous KH solution? () () CH = CH () (+) CH( t Bu)CH () ( ) CH( t Bu)CH ( ) CH( t Bu)CH CH = CH 7. Which of the following species is not paramagnetic? C () () B N C 7. n treatment of 100 ml of 0.1 M solution of Co.6H with excess AgN ; ions are precipitated. The complex is : [Co(H ) ].H () [Co(H ) 6 ] () [Co(H ) 5 ].H [Co(H ) 4 ].H () [Co(H ) 5 ].H 74. pk a of a weak acid (HA) and pk b of a weak base (BH) are. and.4, respectively. The ph of their salt (AB) solution is : () 7.0 () The increasing order of the reactivity of the following halides for the S N 1 reaction is : CH CHCH CH CH CH CH (I) (II) p H C H 4 CH (III) 1- Anasagar Circular Road, pp. Chaupati, Ajmer

3 (II) < (I) < (III) () (I) < (III) < (II) () (II) < (III) < (I) (III) < (II) < (I) (II) < (I) < (III) 76. Both lithium and magnesium display several similar properties due to the diagonal relationship; however, the one which is incorrect, is : both form soluble bicarbonates () both form nitrides () nitrates of both Li and Mg yield N and on heating both form basic carbonates both form basic carbonates 77. The correct sequence of reagents for the following conversion will be : CH MgBr, H + /CH H, [Ag(NH ) ] + H () CH MgBr, [Ag(NH ) ] + H, H + /CH H () [Ag(NH ) ] + H, CH MgBr, H + /CH H [Ag(NH ) ] + H, H + /CH H, CH MgBr [Ag(NH ) ] + H, H + /CH H, CH MgBr 78. The products obtained when chlorine gas reacts with cold and dilute aqueous NaH are : () 79. Which of the following compounds will form significant amount of meta product during mononitration reaction? () () JEE Main Methly-pent--ene on reaction with HBr in presence of peroxide forms an addition product. The number of possible stereoisomers for the product is : Zero () Two () Four Six () Four 81. Two reactions R 1 and R have identical preexponential factors. Activation energy of R 1 exceeds that of R by 10kJ mol 1. If k 1 and k are rate constants for reactions R 1 and R respectively at 00 K, then ln(k /k 1 ) is equal to: () 4 (R = 8.14 j mol 1 K 1 ) 1 () 6 () Which of the following molecules is least resonance stabilized? and () and () () and and () and () 1- Anasagar Circular Road, pp. Chaupati, Ajmer

4 JEE Main () 8. The group having isoelectronic species is :, F, Na, Mg + (), F, Na, Mg + (), F, Na +, Mg +, F, Na +, Mg +, F, Na +, Mg The radius of the second Bohr orbit for hydrogen atoms is: (Planck's Const. h = Js; mass of electron = kg; charge of electron e = C; permittivity of vacuum 1 1 ) kg m A 4.76Å () 0.59Å ().1Å 1.65Å ().1Å 85. The major product obtained in the following reaction is : () 86. Which of the following reactions is an example of a redox reaction? XeF PF5 [ XeF] PF6 () XeF6 H XeF4 HF () 6 XeF H Xe F 4HF XeF4 F XeF6 XeF4 F XeF6 87. A metal crystallises in a face centred cubic structure. If the edge length of its unit cell is 'a', the closest approach between two atoms in metallic crystal will be : a () a () () a a a () 88. Sodium salt of an organic acid 'X' produces effervescence with conc. H S 4. 'X' reacts with the acidified aqueous Ca solution to give a white precipitate which decolourises acidic solution of KMn 4. 'X' is : 1- Anasagar Circular Road, pp. Chaupati, Ajmer

5 HCNa () CH CNa () Na C 4 CNa () Na C A water sample has ppm level concentration of following anions F 10; S 100; N 50 4 The anion/anions that make/makes the water sample unsuitable for drinking is/ are : both () only F () only S 4 and N S 4 only N () only F 90. Which of the following, upon treatment with tert-buna followed by addition of bromine JEE Main-017 water, fails to decolourize the colour of bromine? () () 5 1- Anasagar Circular Road, pp. Chaupati, Ajmer