Engineering Questions — Chemistry
170 solved questions with detailed explanations
Q.62. The correct order of the rate of the reaction for the following reaction with respect to nucleophiles is: CHBr + Nu CHNu + Br
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: 1,4-dichlorobenzene] is more symmetric, its mel
Q.61. Consider the following molecules/species: [Figure: Three organic molecules labeled (x), (y), and (z). (x) is CH₃-C(=O)-CH₃ (acetone). (y) is CH₃-C(=O)-O⁻ (acetate ion). (z) is CH₃-C(=O)-H (aceta
Q.58. Consider the following data : Electrolyte | (S cm mol) BaCl | x HSO | x HCl | x BaSO is sparingly soluble in water. If the conductivity of the saturated BaSO solution is x S cm then the solubil
Q.75. At the transition temperature T, A B and where A and B are two states of substance X. The transition temperature in °C when pressure is 1 atm is _________ (Nearest integer)
Q.60. Given below are two statements : Statement-I : Presence of large number of unpaired electrons in transition metal atoms results in higher enthalpies of their atomisation. Statement-II : and ar
Q.63. Given below are two statements : Statement (I) : 1,2,3-Trihydroxypropane can be separated from water by simple distillation. Statement (II): An azeotropic mixture cannot be separated by fraction
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.73. One mole of phenol is treated with dilute HNO₃ at 298K to give a mixture of products. The mixture is separated by steam distillation. The seam volatile compound (X) is separated. The increase in
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