Engineering Questions — Chemistry — Jee Main
160 solved questions with detailed explanations
Q.55. Arrange the following isothermal processes in order of the magnitude of the work (p - V) involved between states 1 and 2. A. Expansion in single stage wA B. Expansion in multi stages wB C. Compr
Q.64. The total number of aromatic compounds/species from the following is [Figure: Six chemical structures]
Q.65. The following structures are [Figure: Two organic molecules, RS1 and RS2, are shown. RS1 is 1-bromo-1-chloro-2,2-dimethylcyclopropane. RS2 is 1-bromo-1-chloro-2,2-dimethylcyclopropane, but drawn
Q.59. Pairs of elements with the same number of electrons in their respective 4f orbital are [Atomic number, Eu-63, Gd-64, Dy-66, Ho-67, Tm-69, Yb-70, Lu-71, Hf-72] A. (Eu and Gd) B. (Dy and Ho) C. (Y
Q.71. The total number of unpaired electrons present in the , (low spin) (high spin), (high spin) and (low spin) octahedral complex systems is
Q.69. Given below are two statements : Statement I: The correct order in terms of bond dissociation enthalpy is Cl₂ > Br₂ > F₂ > I₂. Statement II: The correct trend in the covalent character of the me
Q.68. A D-aldotetrose on oxidation with concentrated HNO₃ resulted in optically inactive dicarboxylic acid. The structure of the D-aldotetrose is :
Q.55. By usual analysis, 1.00g of compound (X) gave 1.79g of magnesium pyrophosphate. The percentage of phosphorus in compound (X) is: (nearest integer) (Given, molar mass in g mol: O = 16, Mg = 24, P
Q.61. Identify the correct statements from the following: (A) [Fe(C₂O₄)₃]³⁻ is the most stable complex among [Fe(OH)₆]³⁻, [Fe(C₂O₄)₃]³⁻ and [Fe(SCN)₆]³⁻. (B) The stability of [Cu(NH₃)₄]²⁺ is greater t
Q.67. The strongest conjugate acid will result from [Figure: Four conjugate acids are shown. (1) Anilinium ion (protonated aniline). (2) p-Methoxyanilinium ion. (3) p-Nitroanilinium ion. (4) p-Methyla
Q.58. The correct set that contains all kinds (basic, acidic, amphoteric and neutral) of oxides is :
Q.72. RMgI when treated with ice cold water liberated a gas which occupied 1.4 dm/g at STP. The gas produced is further reacted with iodine in presence of , to give compound (X). Compound (X) in prese
Q.68. Which statements are True? A. In Hoffmann bromamide degradation, 4 moles of NaOH and 2 moles of Br₂ are consumed per mole of an amide B. Hoffmann bromamide reaction is not given by alkyl amides.
Q.62. Consider |x| is the difference in oxidation states of Mn in highest manganese fluoride and highest manganese oxide. The ions with x number of unpaired electrons from the following are: A. Sc³⁺ B
Q.57. The 1st ionization enthalpy for Mg is +737 kJ/mol. The most probable estimated value of the 2nd ionization enthalpy of Mg is ______.
Q.64. Identify the correct IUPAC name of hydrocarbon (x) containing three primary carbon atoms and with molar mass 72 g mol⁻¹.
Q.53. is isostructural with : Choose the correct answer from the options given below:
Q.60. Given below are two statements : Statement I: The number of pairs among [Ti, V], [V, Mn], [Mn, Fe] and [V, Cr] in which both ions are coloured is 3. Statement II: The number pairs among [La, Yb]
Q.57. Match List-I with List-II. List-I (Reagents) A. H, Pd-BaSO B. SnCl, HCl C. CrOCl, CS D. CO, HCl, Anhyd. AlCl List-II (Reaction Name (Involving aldehydes)) I. Etard Reaction II. Rosenmund Reducti
Q.51. The ratio of mass percentage (w/w) of C : H in a hydrocarbon is 12 : 1. It has two carbon atoms. The weight (in g) of formed when 3.38 g of this hydrocarbon is completely burnt in oxygen is : (