Engineering Questions — Chemistry — JEE Main
160 solved questions with detailed explanations
Q.55. 20 mL of a solution of acetic acid required 28.4 mL of 0.1 M NaOH for its neutralization. A solution (X) was prepared by mixing 20 mL of the above acetic acid and 14.2 mL of 0.1 M NaOH solution.
Q.59. Find the correct statements related to group 15 hydrides. A. Reducing nature increases from NH₃ to BiH₃ B. Tendency to donate lone pair of electrons decreases from NH₃ to BiH₃ C. The stability o
Q.69. Among Fe³⁺, Pb²⁺, Cu²⁺ and Mn²⁺, identify the one that gets precipitated out while passing H₂S in presence of NH₄OH as group reagent. The highest possible oxidation state of the corresponding me
Q.64. Given below are two statements : Statement-I : 2, 6-diethylcyclohexanone and 6-methyl-2-n-propylcyclohexanone are metamers. Statement-II: 2, 2, 6, 6-tetramethylcyclohexanone exhibits keto-enol t
Q.51. An oxide of iron contains 69.9% iron, its empirical formula, is: (Given : Molar mass of Fe and O are 56 and 16 g mol respectively.)
Q.60. Consider the metal complexes [Ni(en)] (A), [NiCl] (B) and [Ni(NH)] (C). Choose the CORRECT option by considering the number of unpaired electron present in (A), (B) and (C) respectively and the
Q.52. The first and second ionization constants of a weak dibasic acid are and respectively. 0.1 mol of was dissolved in 1L of 0.1 M HCl solution. The concentration of in the resultant solution i
Q.66. Given below are two statements : Statement-I : 3-phenylpropene reacts with HBr and gives secondary alkyl bromide having a chiral carbon atom as the major product. Statement-II: Aryl chlorides an
Q.69. Given below are two statements : Statement-I : [Figure: Glucose anomers] are two anomers of D-(+)-glucose. Statement-II : The open chain forms of D-glucose and D-fructose contain three similar c
Q.71. If 3.365 g of ethanol (l) burnt completely in a bomb calorimeter at 298.15K, the heat produced is 99.472 kJ. The |ΔH| of ethanol at 298.15 K is ______ × 10² kJ mol⁻¹. (Nearest integer) Given : S
Q.62. Given below are two statements : Statement I: Vapours of the liquid with higher boiling point condense before vapours of the liquid with lower boiling points in fractional distillation. Statemen
Q.74. Sucrose hydrolyses in acidic medium into glucose and fructose by first order rate law with t = 3 hour. The percentage of sucrose remaining after 6 hours is ______ (Nearest integer) (Given: log 2
Q.53. Which of the following pictorial diagram most correctly represents the ( - antibonding) molecular orbital between two atoms if the internuclear axis is taken to be in the z-direction (z-axis )?
Q.63. R value for 2-methylpropene in a solvent system (Ethyl acetate + ether) is 0.42. 2-methylpropene is treated with dilute HSO to give major organic product (X). R value for (X) in the same solvent
Q.53. The covalent radii of atoms A and B are r and r, respectively. The covalent bond length and total length of AB molecule are respectively :
Q.54. Consider the following data for the reaction at 600 K. The (in kJ mol⁻¹) for the reaction is: [Figure: Table with A/H600K and S600K values for XY(g), X2(g), Y2(g)]
Q.70. A paper dipped in a dil. HSO solution of 'X' upon treatment with SO gas turns into green. The compound 'X' is :
Q.59. The correct order of reactivity of the following benzyl halides towards reaction with KCN is: [Figure: Four benzyl halides are shown: (a) Benzyl bromide with -OH group at para position. (b) Benz
Q.63. Given below are two statements: Statement I: Crystal Field Stabilization Energy (CFSE) of [Cr(HO)] is greater than that of [Mn(HO)]. Statement II: Potassium ferricyanide has a greater spin-only
Q.59. Find the correct statements related to group 15 hydrides. A. Reducing nature increases from NH to BiH. B. Tendency to donate lone pair of electrons decreases from NH to BiH. C. The stability of