Chemistry Online Test for JEE, NEET and EAMCET Exams April 22, 2019 by admin 1. Phenol can be distinguished from ethanol by the following reagents except 1) sodium2) NaOH / I23) Neutral FeCl34) Br2 / H2O 2. The rate of a first order reaction is 1.5 ×10-2 mol L-1 min-1 at 0.5 M concentration of the reactant. The half life of the reaction is 1) 23.1 min 2) 8.73 min3) 7.53 min 4) 0.383 min 3. Which of the following is used as “morning after pill”? 1) Ethynyl estradiol2) Mifepristone3) Norethindrone4) Promethazine 4. For the given complex ,[CoCl2(en)(NH3)]+ the number of geometrical isomer’s, the number of optical isomers and the total number of isomers of all type possible respectively are 1) 2,2 and 4 2) 2,0 and 23) 2,2 and 3 4) 0,2 and 2 5. The correct order of E0 M+2/M values with negative sign for the four successive elements Cr,Mn,Fe and Co is 1) Cr > Mn > Fe > Co2) Cr > Fe > Mn > Co3) Fe > Mn > Cr > Co4) Mn > Cr > Fe > Co 6. 51. Cyclohexene on ozonolysis followed by reaction with Zn dust and water gives compound ‘E’. Compound ‘E’ on further treatment with aqu.KOH yields compound ‘F’. Compound ‘F’ is 7. What would be the product formed when 1-bromo-3 chloro cyclo butane reacts with two equivalents of metallic sodium in ether 8. In Na2O having antifluorite structure 1) oxide ions have cubic closepacked arrangement and Na+occupy all the octahedral voids.2) oxide ions have cubic closepacked arrangement and Na+occupyall the eight tetrahedral voids3) Na+ ions have c.c.p arrangement and O2-occupy all tetrahedral voids.4) Na+ ions have c.c.p arrangementand O2- occupy all octahedral voids 9. A solution ‘X’ contains 30 mole percent of A and is in equilibrium with its vapour that contains 40 mole percent of ‘B’. The ratio of vapor pressure of pure A and B will be: 1) 2 : 1 2) 7 : 23) 3 : 4 4) 4 : 3 10. The standard reduction potential for Cu+2/ Cu is +0.34V.Calculate the reduction potential at pH=14 for the above couple. Ksp of Cu(OH)2= 1.0×10-19 1) +0.2205V 2) +0.386V 3) -0.2205V 4) -0.386V 11. Which plot is the adsorption isobar for chemisorption. 12. When the value of azimuthal quantum number is 3, the maximum and the minimum values of the spin multiplicities are 1) 4,3 2) 8,13) 1,3 4) 8,2 13. The weight of H2O2present in 80 ml of 10V H2O2 solution is 1) 3.2 gr 2) 4.2 gr3) 2.4 gr 4) 3.6 gr 14. If mercury is used as cathode in the electrolysis of aqueous NaCl solution, the ions discharged at cathode are 1) H+2) Na+3) OH-4) Cl- 15. For one mole of a vanderwaal’s gaswhen b=0 and T=300K, the PV vs1/V plot is shown below. The value of vander waal’s constant ‘a’ in atm.lit2 mole-2 is (graph not to scale) 1) 1.0 2)4.5 3) 1.5 4) 3.0 16. The equivalent weight of HCl in the given reaction is KCr2O7 +14 HCl -->2KCl + 2CrCl3 +3Cl2 +H2O 1) 16.25 2) 36.5 3) 73 4) 85.1 17. At what temperature will average speed of the molecules of the second member of the series CnH2n be the same of Cl2 at 6270C? 1) 259.4K 2) 400K3) 532.4K 4) 628K 18. When two moles of an ideal gas (Cpm=(5/2)R) heated from 300K to 600K at constant pressure. The change in entropy of gas (∆s ) is 1) (3/2)R ln22) (-3/2)R ln23) 5R ln24) (5/2)R ln2 19. I2(aq) + I- (aq) --> I-3(aq)+ We started with 1 mole of I2 and 0.5 mole of I- in one litre flask. After equilibrium is reached excess of AgNO3 gave 0.25 mole of yellow precipitate. Then Equilibrium constant is 1) 1.33 2) 2.663) 2.0 4) 3.0 20. The values of electro negativity of atoms A and B are 1.20 and 4.0 respectively. The percentage ionic character of A-B bond is 1) 50% 2) 72.24%3) 55.3% 4) 43% 21. The plots of 1/ XA Vs 1/YA ( where XA and YA are the mole fraction of liquid A in liquid and vapour phase respectively) is linear with slope and intercepts respectively 22. An oxide of Nitrogen which form reddish brown fumes in air is 1) N2O2) NO23) NO 4) N2O3 23. Iron sulphide is heated in air to form ‘A’ . ‘A’ is dissolved in water to give ‘Y’. The basicity of ‘Y’ is 1) 1 2) 2 3) 0 4) 3 24. Which one of the following oxyacids of chlorine is the least oxidising in nature 1) HOCl 2) HClO23) HClO44) HClO3 25. Which of the following organ metallic compound is σ and π bonded? 1) [ Fe(η5 -C2H5)2 ]2) [ PtCl3 (η2 -C2H4 ) ]3) [ Co(Co)5 NH3 ]+24) All the above 26. 1) Glyptal 2) Dacron 3) Nylon-6,6 4) Nylon-6 27. An acid-base indicator has a In Kln of 3 ×10-5. The acid form of indicator is red and the basic form is blue. Then 1) pH is 5.00 when indicator is 50%blue.2) pH is 4.05 when indicator is 75%red.3) pH is 5.00 when indicator is 75%red4) pH is 4.05 when indicator is 75%blue. 28. Which of the following vitamin contains ionone ring and hydrocarbon chain. 1) Calciferol 2) Thiamin3) Retinol 4) Riboflavin 29. Which of the substances added to soap make it antiseptic? 1) Iodine2) KMnO43) Bithional 4) Cl2 30. Which of the following ‘gem’ diols is stable? 31. Incorrect statements about X and Y are 1) formation of Y is a syn addition 2)during the formation of X, the intermediate is a carbocation 3) X is a positional isomer of Y 4) formation of Y follows markonikov's rule 32. The correct order of increasing acidic strength of the compounds A) CH3CO2H B) MeOCH2CO2H C) CF3CO2H D) 1) D < A < B < C 2) A < D < B < C 3) B < D < A < C 4) D < A < C < B 33. The ratio of number of moles of Hydrogen atoms required to get 1 mole of azobenzene and 1 mole of hydrazobenzene is 1) 4 : 5 2) 5 : 4 3) 1 : 1 4) 2 : 3 34. A possitive carbylamine test is given by 1) N,N – dimethyl aniline2) Isopropyl amine3) diethyl amine4) trimethyl amine 35. Which of the following amines form N-nitroso derivative when treated with NaNO2 and HCl 1) CH3NH22) C6H5 - NH2 3) C6H5 - NH - R 36. Which of the following compound react faster through SN2mechanism 1) CH3- CH2Br2) CH3- O - CH2Br3) C6H5- CO - CH2Br4) CH3 - C (CH3 )2- CH2Br 37. The most volatile alkane is 1) n – pentane 2) isopentane3) neopentane 4) n–hexane 38. The hybridisation of Beryllium in Beryllate ion formed when Beryllium hydroxide dissolves in excess of alkali? 1) sp 2) sp23) sp34) dsp2 39. The correct statement among the following is: i) NaBH4 produce BH6 on reaction with I2 ii) Reaction between B2H6 and NMe3 is an acid base reaction iii) BH6 is produced on industrial scale by reaction with BF3, NaH iv) Boranes on hydrolysis produce B2H6 and H2 gas 1) All are correct 2) Only i & ii are correct 3) Only iv is correct 4) Only i, ii, iii are correct 40. Incorrect statement among the following is 1) Pure CO is prepared bydehydration of formic acid with conc. H2S42) Commercially CO is prepared byassing steam over red hot coke3) CO is a powerful reducing agentand reduces almost all metal oxidesother than IA, IIA group elements,Al etc...4) CO is a Lewis acid 41. Which of the following will have highest negative enthalpy of formation? 1) RbF 2) KF3) CsF 4) NaF 42. Most basic and acidic oxides are formed by the following 3rd period elements. 1) Cs, Cl 2) Na, Cl3) Na, F 4) Cs, S 43. The pair of molecules having same geometry and same bond angles are 1) NH4 +,PCl32) NH4+ , CH43) H2O , SO24) NH3 , PH3 44. Kjeldahl’s method cannot be used for estimation of nitrogen in I) C6H5CO NH2 II) Pyridine III) C6H5-N=N-C6H5 1) I,III 2) II,III 3) III,IV 4) I,II 45. Benzene reacts with cholorine in the presence of U.V. light and gives 1) Chloro Benzene2) 1, 2-dichloro Benzene3) Hexachloro cyclohexane4) Benzyl chloride 46. If lone pair of electron occupy axial position then, incorrect about is : 1) It is a planar molecule2) It has T-shape3) All bond lengths are equal4) repulsion will be minimum 47. Which of the following is incorrect for the indicated property 1) Beo < Mgo (Basic strength)2) SO2> SeO2> TeO2 (Acidic strength)3) Nacl > KCl > RbCl > CsCl (Melting point)4) BaSO4> SrSO4> CaSO4>MgSO4> BeSO4 (Solubility) 48. Select species which is planar at nitrogen 1) (CH3)3N2) (SiH3)3N3) XeF24) SF4 49. Total number of coordination isomers shown by complex [Co(NH3)6] [Cr(Cl)6] is: 1)4 2)5 3)6 4)0 50. Xe has max. EN in:- 1) XeF22) XeF43) XeO44) XeOF2 51. The correct statement/s about H2 S2 O7 is/are 1) It is called peroxydisulphuric acid 2) It is contains one O-O bond in its molecule 3) It is obtained by dissolution of SO3 in conc. H2 SO4 4) Both (2) & (3) 52. Find correct statement 1) KMnO4 is coloured due to d-d transition2) K4[Fe(CN)6] is low spin complex3) Zn and Cd are transition metal4) All lanthanoids are radioactive 53. The first ionization potential of Na is 5.1eV The value of electron gain enthalpy of Na+ will be 1) -2.55eV 2) -5.1eV3) -10.21eV4) +2.55eV 54. Which one of the following is a mineral of iron? 1) Pyrolusite 2) Magnetite 3)Malachite 4) Cassiterite 55. In which of the following pairs, both the species are not isostructural? 1) NH3 , PH32) XeF4 , XeO43) SiCl4 , PCl+44) diamond, silicon carbide 56. Which property is common in diamond and graphite 1) Electrical conductivity2) Crystal structure3) Relative atomic mass4) Density 57. When H2S is passed through acidified KMnO4 we get 1) K2 SO32) MnO23) KHSO34) Sulphur 58. The shortest wavelength of He+ ion in Balmer series is x, then longest wavelength in the paschen series of Li2+is 1) 36x/52) 16x/73) 9x/54) 5x/5 59. The molecule which is having maximum number of lone pair 1) SiF42) BrF33) XeF24) SF4 60. What will be the equivalent weight of H3PO3 in the following reaction. 4H3PO3 → 3H3PO4 +PH3 1) M/62) 2M/33) M/124) M/2 61. 20g of naphthoic acid (C11H8O2) is dissolved in 50g of benzene, then freezing point depression of 2K is observed for solution. The vant hoff factor will be ( Kf for benzene=1.72 Kg Mol-1) 1) 0.75 2) 2 3) 0.5 4) 3 62. Henderson equation pH - pKa = 5 will be applicable to an acidic buffer when:- 1) [ Acid ] = [conjugatebase]2) [ Acid ] × 105 = [conjugatebase]3) [ Acid ] = [conjugatebase]× 1054) [ Acid ] = 2[conjugatebase] 63. The conductivity of saturated solution of BaSO4is 3.06×10-6 mho cm-1and its equivalent conductance is 1.53 mho cm-2 eq-1. Then Ksp for BaSO4 will be 1) 4×10-12M2) 1×106M3) 4×106M24) 1×10-6M2 64. Which artificial sweetner contains chlorine 1) Aspartame 2) Saccharin3) Sucralose 4) Alitame 65. Which of the following has minimum flocculation value for positively charged sol ? 1) Cl-2) SO42-3) PO43-4) [Fe(CN)6]4- 66. The vapour pressure of a dilute solution of glucose is 750 mm of Hg at 373K. The mole fraction of solute is 1) 1/7.62) 1/763) 1/354) 1/10 67. For decolourization of one mole of KMnO4 the required litre of 30 volume H2O2 in acidified medium is 1) 0.94 2) 9.4 3) 0.094 4) 3.01 68. 75% completion of a first order reaction takes 2.38 hours. How much time will it take for 99.9% completion? 1) 1.39 h 2) 7.14h 3) 11.9 h 4) 15.85 h 69. The number of carbon atoms per unitcell of diamond unitcell is 1) 8 2) 6 3) 1 4) 4 70. When 0.1mole MnO42- is oxidized, the quantity of electricity required in coulombs to completely oxidize MnO42- to MnO4- is 1) 96500 2) 2×96500 3)9650 4) 96.50 71. The half life of a reaction is 46 minutes when the initial concentration of the reactant is 4 mol/L and 92 minutes when the initial concentration is 0.2mol/L. The order of the reaction is 1) Zero 2) 0.53) 2 4) 1 72. Equimolar solutions of the following were prepared in water separately. Which one of the solution will record the highest pH? 1) BaCl22) MgCl23) CaCl24) SrCl2 73. Number of carbon atoms in principal carbon chain 1) 7 2) 4 3)6 4)5 74. Find the correct order of acidity of the following compounds 1) III> II> I> IV 2) III> I> II> IV 3)III> II> IV> I 4) IV> I> II> III 75. Which of the following C – H bond has the least bond dissociation energy 1)2)3)4) 76. Compound having least heat of hydrogenation: 1)2)3)4) 77. 1)2)3) 4) 78. Number of stereoisomers of the given compound 1) 2 2)3 3)4 4)6 79. To form osazone, mumber of moles of phenyl hydrazine required by one mole of glucose is 1) 4 2) 3 3) 2 4) 1 80. DNA & RNA are chiral molecules due to the presence of 1) Chiral bases2) Phosphate ester unit3) D- sugar component4) L – sugar component 81. Copper crystallizes in fcc with a unit cell length of 361 pm. What is the radius of copper atom? 1) 127 pm 2) 157 pm 3) 181 pm 4) 108 pm 82. Method which is based on difference in solubility of impurities in molted metal and solid state of metal is 1) Parke’s process 2) bessemerisation 3) zone refining 4) electrolytic refining 83. Addition of dilute HCl or FeCl3 solution to freshly precipitated ferric hydroxide, a red coloured colloidal solution is obtained. The phenomenon is known as 1) peptisation 2) dialysis 3) osmosis 4) coagulation 84. At Boyles temperature, compressibility factor Z for a real gas is 1) Z = 1 2) Z = 0 3) Z > 1 4) Z >> 1 85. The impure 7g of NaCl is dissolved in water and then treated with excess of silver nitrate solution. The weight of precipitate of silver chloride is found to be 14g. The % purity of NaCl solution would be (M. Wt of AgCl = 143.5, NaCl = 58.5) 1) 81.5% 2) 63% 3) 93% 4) 77% 86. V1 ml of 3M HCl solution is mixed with V2ml of 3M H2SO4 to from a solution in which molarity of H+ ions is 5M, then the relation between V1and V2is 1) V1= V22) V2=2V13) 3V1= V24) 2V2= V1 87. Assertion: Graphite is thermodynamically most stable allotrope of carbon Reason: ΔHf0 of graphite is taken as zero 1) Both assertion and reason are correct, reason is the correct explanation of the assertion.2) Both assertion and reason are correct reason is the not correct explanation of the assertion.3) Assertion is correct, reason is incorrect.4) Assertion is incorrect, reason is correct. 88. Aqueous solutions of two compounds M-O-H and M1-O-H have been prepared in two different beakers. If the electronegativity of M=3.5, M1=0.9, O=3.5 and H=2.1, then the solutions respectively are 1) acidic, acidic 2) acidic, basic 3) basic, basic 4) basic, acidic 89. The pH of a solution of H2O2is 6.0. Some chlorine gas is bubbled into this solution. Which of the following is correct? 1) The pH of resultant solution becomes 8.02) Hydrogen gas is liberated from resultant solution3) The pH of resultant solution becomes less than 6.0 and oxygen gas is liberated4) Cl2O is formed in the resultant solution 90. The pH of a solution of H2O2is 6.0. Some chlorine gas is bubbled into this solution. Which of the following is correct? 1) The pH of resultant solution becomes 8.02) Hydrogen gas is liberated from resultant solution3) The pH of resultant solution becomes less than 6.0 and oxygen gas is liberated4) Cl2O is formed in the resultant solution 91. A and B are compounds of sodium. ‘A’ is thermally stable. On passing CO2 through aq. solution ‘A’, ‘B’ is formed. ‘B’ on heating gives ‘A’. Phenolpthalein is added to aqueous solutions of A, B. The colours are 1) colourless, colourless 2) pink, pink 3) colourless, pink 4) pink, colourless 92. Beryllium and aluminium exhibit many properties which are similar. But, the two elements differ in 1) exhibiting amphoteric nature in their oxides 2) forming polymeric hydrides3) forming covalent halides4)exhibiting same covalency incompounds 93. 100ml of O 2 on partial ozonisation, O2 and O3are obtained in the molar ratio of 1 : 1 what % of O2is converted into ozone 1) 60% 2) 50% 3) 40% 4) 57% 94. Which of the following is not correctly matched? 1) Teflon –Additional polymer 2) Gun cotton –synthetic polymer3) Protein – natural polymer 4) Nylon-6, 6 – condensation polymer 95. In Kjeldahl ‘s method, the nitrogen gas evolved from 1.325 g sample of a fertilizer is passed into 50.0 mL of 0.2030 N H2SO4mL of 0.1980 N NaOH are required for the titration of unused acid. The percentage of nitrogen in fertilizer is 1) 10.86% 2) 21.72 % 3) 5.43 % 4) 2.75 % Loading...
Super 30 Entrance Test – Free Online Mock Exam April 18, 2020April 22, 2019 by admin Please go to Super 30 Entrance Test – Free Online Mock Exam to view this Mock Test
