Engineering Questions — Chemistry — JEE Main

Q.72. In an estimation of sulphur by Carius method 0.2g of the substance gave 0.6 g of BaSO₄. The percentage of sulphur in the substance is %. (Given molar mass in g mol⁰ S : 32, BaSO₄ : 231)

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 c

Q.53. Consider the above sequence of reactions. The number of bromine atom(s) in the final product (P) will be: [Figure: A reaction scheme starting with nitrobenzene. 1. Br/FeBr/A (bromination of nitr

Q.72. Consider the following sequence of reactions. [Figure: Reaction scheme starting with a diazonium salt, reacting with (i) HCl, (ii) Aniline (in excess), (iii) Warm 40-45°C, (iv) Cool, acetic acid

Q.73. 20 g hemoglobin in a 1 L aqueous solution (A) at 300 K is separated from pure water by semi permeable membrane. At equilibrium the height of solution in a tube dipped in a solution (A) is found

Q.73. A substance 'X' (1.5 g) dissolved in 150 g of a solvent 'Y' (molar mass = 300 g mol⁻¹) led to an elevation of the boiling point by 0.5 K. The relative lowering in the vapour pressure of the solv

Q.62. Which of the following are true about the energy of the given d-orbitals of a tetrahedral complex ? A. d = d > d B. d = d > d C. d > d > d D. d = d < d Choose the correct answer from the options

Q.60. The correct statements among the following are : A. Basic vanadium oxide is used in the manufacture of HSO. B. The spin-only magnetic moment value of the transition metal halide employed in Zieg

Q.66. Given below are two statements : Statement-I : The condensation reaction between and under optimum pH will produce . Statement-II : The molecule, [Figure: Molecule structure] will generate Ph–

Q.56. Consider the following data: (methane, g) = -X kJ mol Enthalpy of sublimation of graphite = Y kJ mol Dissociation enthalpy of H = Z kJ mol The bond enthalpy of C – H bond is given by: