Practice Questions

Q41.Which of the following compounds will form significant amount of meta product during mono-nitration reaction? (1) (2) (3) (4)

Q42.Consider the following ionization enthalpies of two elements 'A' and 'B'. Element Ionization enthalphy (kJ / mol) 1st 2nd 3rd A 899 1757 14847 B 737 1450 7731 Which of the following statements is correct? (1) Both 'A' and 'B' belong to group-1 where 'A' (2) Both 'A' and 'B' belong to group-2 where 'A' comes below 'B'. comes below 'B'. (3) Both 'A' and 'B' belong to group-1 where 'B' (4) Both 'A' and 'B' belong to group-2 where 'B' comes below 'A'. comes below 'A'.

Q42.Which one of the following is an oxide? (1) SiO2 (2) KO2 (3) BaO2 (4) CsO2

Q43.Which of the following statements is not true about partition chromatography? (1) Stationary phase is a finely divided solid (2) Separation depends upon equilibration of solute adsorbent. between a mobile and a stationary phase. (3) Mobile phase can be a gas. (4) Paper chromatography is an example of partition chromatography.

Q43.Which of the following compounds is most reactive to an aqueous solution of sodium carbonate? JEE Main 2017 (09 Apr Online) JEE Main Previous Year Paper (1) (2) (3) (4)

Q44.In the following structure, the double bonds are marked as I, II, III and IV. Geometrical isomerism is not possible at the site(s): (1) I and III (2) III (3) I (4) III and IV

Q45.Which of the following compounds will not undergo Friedel Crafts reaction with benzene? (1) (2) (3) (4)

Q45.The major product of the following reaction is: (1) (2) (3) (4)

Q46.Which of the following is a set of greenhouse gases? (1) O3, NO2, S O2, Cl2 (2) CH4, O3, N2, SO2 (3) CO2, CH4, N2O, O3 (4) O3, N2, CO2, NO2

Q46.Two reactions A1 and A2 have identical pre-exponential factors. The activation energy of A1 is more than A2 by 10 kJ mol-1 . If k1 and k2 are the rate constants for reactions A1 and A2, respectively at 300 K, then k2 ln⁡ is equal to k1 R = 8 .314 J mol-1K-1 (1) 12 (2) 6 (3) 4 (4) 8

Q47.A solution is prepared by mixing 8. 5 g of CH2 Cl2 and 11.95 g of CHCl3 . If vapour pressure of CH2 Cl2 and CHCl3 at 298 K are 415 and 200 mm Hg respectively, the mole fraction of CHCl3 in vapour form is: (Molar mass of Cl = 35.5 g mol−1) (1) 0. 162 (2) 0. 675 (3) 0. 325 (4) 0. 486 JEE Main 2017 (09 Apr Online) JEE Main Previous Year Paper

Q48.Which of the following ions does not liberate hydrogen gas on reaction with dilute acids? (1) V2+ (2) Ti2+ (3) Mn2+ (4) Cr2+

Q48.The products obtained when chlorine gas reacts with cold and dilute aqueous NaOH are (1) ClO2- and ClO3- (2) Cl- and ClO- (3) Cl- and ClO2- (4) ClO- and ClO3-

Q48.Consider the following standard electrode potentials ( Eo in volts) in aqueous solution: Element M3+/M M+/M Al −1.66 +0.55 Tl +1.26 −0.34 Based on these data, which of the following statements is correct? (1) Tl+ is more stable than Al3+ (2) Al+ is more stable than Al3+ (3) Tl3+ is more stable than Al3+ (4) Tl+ is more stable than Al+

Q49.Which of the following reactions is an example of a redox reaction? (1) XeF2 + PF5 →XeF+PF6- (2) XeF6 + H2O →XeOF4 + 2HF (3) XeF6 + 2H2O →XeO2F2 + 4HF (4) XeF4 + O2F2 →XeF6 + O2

Q49.What is the standard reduction potential (Eo) for Fe3+ →Fe? Given that: Fe2+ + 2e−→Fe; Eo = −0 .47 V Fe2+ / Fe Fe3+ + e−→Fe2+; Eo = +0 .77 V Fe3+ / Fe2+ (1) −0 .057 V (2) +0 .30 V (3) −0 .30 V (4) +0 .057 V

Q49.To find the standard potential of M3+/M electrode, the following cell is constituted: Pt /M/M3+ (0 .001 mol L−1)/ Ag+ (0 .01 mol L−1)/ Ag The emf of the cell is found to be 0. 421 volt at 298 K. The standard potential of half-reaction M3+ + 3e−→M at 298 K will be: (Given: E⊝ at 298 K = 0. 80 volt) Ag+/Ag (1) 0. 38 volt (2) 1. 28 volt (3) 0. 32 volt (4) 0. 66 volt

Q50.In the following reactions, ZnO is respectively acting as a/an, (i) ZnO + Na2O →Na2ZnO2 (ii) ZnO + CO2 →ZnCO3 (1) base and base. (2) acid and acid. (3) acid and base. (4) base and acid.

Q50.The rate of a reaction A doubles on increasing the temperature from 300 to 310 K . By how much, the temperature of reaction B should be increased from 300 K so that rate doubles if activation energy of the reaction B is twice to that of reaction A. (1) 4. 92 K (2) 9. 84 K (3) 19. 67 K (4) 2. 45 K

Q50.The rate of a reaction quadruples when the temperature changes from 300 to 310 K . The activation energy of this reaction is: (Assume Activation energy and pre-exponential factor are independent of temperature; ln(2) = 0. 693; R = 8. 314 J mol−1 K−1 ) (1) 53. 6 kJ mol−1 (2) 214. 4 kJ mol−1 (3) 107. 2 kJ mol−1 (4) 53. 7 kJ mol−1

Q51.The sodium salt of an organic acid X produces effervescence with concentrated H2SO4. X reacts with the acidified aqueous CaCl2 solution to give a white precipitate which decolourises acidic solution of KMnO4. X is (1) HCOONa (2) CH3COONa (3) Na2C2O4 (4) C6H5COONa

Q51.Among the following, the correct statement is: (1) sols of metal sulphides are lyophilic. (2) Brownian movement is more pronounced for smaller particles than for bigger-particles. (3) one would expect charcoal to adsorb chlorine (4) Hardy Schulze law states that bigger the size of more than hydrogen sulphide. the ions, the greater is its coagulating power.

Q52.On treatment of 100 mL of 0 . 1 M solution of CoCl3 . 6H2O with excess AgNO3; 1 .2 × 1022 ions are precipitated. The complex is: (1) CoH2O3Cl3 . 3H2O (2) CoH2O6Cl3 (3) CoH2O5ClCl2 . H2O (4) CoH2O4Cl2Cl . 2H2O JEE Main 2017 (02 Apr) JEE Main Previous Year Paper

Q52.The number of S = O and S −OH bonds present in peroxodisulphuric acid and pyrosulphuric acid respectively are: (1) (2 and 2) and (2 and 4). (2) (4 and 2) and (4 and 2). (3) (4 and 2) and (2 and 4). (4) (2 and 2) and (2 and 2).

Q52.The number of P −OH bonds and the oxidation state of phosphorus atom in pyrophosphoric acid (H4P2O7), respectively are: (1) Five and four. (2) Four and five. (3) Five and five. (4) Four and four.