Engineering Questions — Chemistry — Jee Main
160 solved questions with detailed explanations
Q.63. The major product of which of the following reaction is not obtained by rearrangement reaction? [Figure: Four reaction schemes with reactants and products]
Q.68. Consider the three aromatic molecules (P, Q and R) whose structures have been given below : [Figure: Three aromatic molecules P, Q, R. P is 1,3,5-trimethylbenzene (mesitylene). Q is 1,2,4,5-tetr
Q.60. Given below are two statements : Statement I: The number of pairs among [Ti⁴⁺, V²⁺], [V³⁺, Mn²⁺], [Mn³⁺, Fe³⁺] and [V⁴⁺, Cr²⁺] in which both ions are coloured is 3. Statement II: The number pair
Q.55. Consider the following reactions in which all the reactants and products are present in gaseous state , , The value of for the equilibrium is :
Q.56. At , 20.0 mL of 0.2 M weak monoprotic acid HX is titrated against 0.2 M NaOH. The pH of the solution (a) at the start of the titration (when NaOH has not been added) and (b) when 10 mL of NaOH i
Q.74. At 298 K, the molar conductivity of x% (w/w) MX solution (aqueous) is 123.5 S cm mol. The conductance of same solution is S. The value of x is ______ . (Given : cell constant = 1.3 cm; molar ma
Q.57. An electrochemical cell is constructed using half cells in the direction of spontaneous change Fe(OH)(s) + 2e Fe(s) + 2OH(aq) E = -0.88V and AgBr(s) + e Ag(s) + Br(aq) E = +0.07V Which of the
Q.57. One half cell in a voltaic cell is constructed by dipping silver rod in solution of unknown concentration, other half cell is Zn rod dipped in 1 molar solution of . A voltage of 1.60 V is measu
Q.52. If shortest wavelength of hydrogen atom in Lyman series is x, then longest wavelength in Balmer series of He is :
Q.69. Match the List-I with List-II : List-I: Deficiency Disease (A) Scurvy (B) Convulsions (C) Cheilosis (D) Xerophthalmia List-II: Vitamin I. Pyridoxine II. Vitamin A III. Ascorbic Acid IV. Riboflav
Q.58. Given below are two statements : Statement-I : The number of pairs among and that contain oxides of same nature (acidic, basic, neutral or amphoteric) is 4. Statement-II : Among and , the mos
Q.75. Consider the reaction X Y at 300 K. If and K are 28.40 kJ mol and 1.8 10 at the same temperature, then the magnitude of for the reaction in J K mol is ______.(Nearest Integer). (Given : R =
Q.56. The reaction was initiated with the amount 'a' of A(g). At equilibrium it is found that the amount of A(g) remaining is (a -x) at a total pressure of p. The equilibrium constant K of the reacti
Q.52. What is the energy (in J atom) required for the following process ? Li(g) Li(g) + e (Take the ionization energy for the H atom in the ground state as J atom)
Q.60. Given below are two statements: Statement-I: The correct order in terms of atomic/ionic radii is Al > Mg > Mg > Al. Statement-II: The correct order in terms of the magnitude of electron gain ent
Q.66. The descending order of acidity among the following compounds is A. [Figure: Phenol] B. [Figure: p-nitrophenol] C. [Figure: p-methoxyphenol] D. [Figure: Benzoic acid] E. [Figure: p-methylphenol
Q.54. At 27° C, 0.1 M, 1 L K₄[Fe(CN)₆] aqueous solution and 0.1 M, 1 L FeCl₃ aqueous solution are placed in a container separated by a semi permeable membrane AB. Assume complete dissociation of both
Q.75. For a reaction A P at T K, the half life () is plotted as a function of initial concentration of A as given below : [Figure: Graph of vs ] The value of x in the given figure is ______ s (Near
Q.64. The total number of aromatic compounds/species from the following is[Figure: Six chemical structures are shown. From left to right, top to bottom: 1. Benzene, 2. Naphthalene, 3. Anthracene, 4. C
Q.75. MX is a sparingly soluble salt that follows the given solubility equilibrium at 298 K MX(s) M⁺(aq) + X⁻(aq); K = 10⁻¹⁰ If the standard reduction potential for M⁺(aq) + e⁻ → M(s) is (E°) = 0.79V