Engineering Questions — Chemistry — JEE Main
160 solved questions with detailed explanations
Q.66. Given below are two statements:Statement-I : Due to increase in van der Waals forces, the order of boiling points is .Statement-II: As [Figure: Structure of p-dichlorobenzene] is more symmetric,
Q.51. The mass of iron converted into FeO by the action of 18 g of steam is : (Given : Molar mass of H, O and Fe are 1, 16 and 56 g mol respectively) Assume iron is present in excess :
Q.51. What volume of hydrogen gas at STP would be liberated by action of 50 mL of of 50% purity (density = 1.3 g mL⁻¹) on 20 g of zinc ? Given : Molar mass of H, O, S, Zn are 1, 16, 32, 65 g mol⁻¹ re
Q.53. Given below are two statements : Statement (I): The correct sequence of bond lengths in the following species is : O < O < O Statement (II): The correct sequence of number of unpaired electrons
Q.55. 19.5 g of fluoro acetic acid (molar mass = 78 g mol) is dissolved in 500g of water at 298 K. The depression in the freezing point of water was 1°C. What is K of fluoro acetic acid ? (For water,
Q.72. 'x' is the product which is obtained from benzene by reacting it with carbon monoxide and hydrogen chloride in the presence of cuprous chloride. 'y' is the major product obtained from the benzen
Q.55. The correct order of molar heat capacities measured at 298 K and 1 bar is :
Q.57. Consider the reaction , for which the rate constant at is . Which of the following statements are true? A. When concentration of 'X' is increased to four times, the rate of reaction becomes 16
Q.61. Match the List-I with List-II List-I (Electronic configuration of tetrahedral metal ion) | List-II (Crystal Field Stabilization Energy ()) A. d | I. -0.6 B. d | II. -0.8 C. d | III. -1.2 D. d |
Q.74. For reaction A → P, rate constant k = 1.5 s⁻¹ at 27°C. If activation energy for the above reaction is 60 kJ mol⁻¹, then the temperature (in °C) at which rate constant, k = 4.5 s⁻¹ is _________
Q.71. Number of paramagnetic complexes among the following is [MnBr₄]²⁻, [NiCl₄]²⁻, [Ni(CN)₄]²⁻, [Ni(CO)₄], [CoF₆]³⁻, [Fe(CN)₆]⁴⁻, [Mn(CN)₆]³⁻, [Ti(CN)₆]³⁻, [Cu(H₂O)₆]²⁺, [Co(C₂O₄)₃]³⁻
Q.57. Given below are two statements : R = 8.314 J K⁻¹ mol⁻¹ and 1 cal = 4.2 J Statement I: When Ea = 12.6 kcal/mol, the room temperature rate constant is doubled by a 10°C increase in temperature (29
Q.52. Which of the following statement(s) is/are true ? (A) If two orbitals have the same value of (n + l), the orbital with lower value of n will have lower energy. (B) Energies of the orbitals in th
Q.51. Consider the following spectral lines for atomic hydrogen: A. First line of Paschen series B. Second line of Balmer series C. Third line of Paschen series D. Fourth line of Bracket series The co
Q.65. Given below are two statements : Statement-I : Methane can be prepared by decarboxylation of sodium ethanoate, Kolbe's electrolysis of sodium acetate and reaction of CHMgBr with water. Statement
Q.70. Which of the following amino acid will give violet coloured complex with neutral ferric chloride solution?
Q.63. IUPAC name of the some alkenes are given below : Find out the correct stability order. A. 2-Methylbut-2-ene B. cis-But-2-ene C. 2,3-Dimethylbut-2-ene D. Prop-1-ene Choose the correct answer from
Q.62. Match List-I with List-II. [Figure: Table matching purification techniques with their uses]
Q.58. Match List-I with List-II. List-I (Electronic configuration of neutral atom (where n = 2)) A. B. C. D. List-II (1st Ionization Energy (kJ mol⁻¹)) I. 2080 II. 899 III. 800 IV. 1402 Choose the
Q.67. Given below are two statements : Statement-I : Heating benzamide with bromine in an ethanolic solution of sodium hydroxide will give benzylamine. Statement-II : Nitration of aniline with at 288