Engineering Questions — Chemistry — JEE (Main)

Q.75. For a reaction A P at T K, the half life (t) is plotted as a function of initial concentration [A] of A as given below : [Figure: Graph showing half-life (t) on y-axis and initial concentration

Q.69. Identify the correct statements A. Glucose exist in two anomeric forms. B. Anomers of glucose differ in configuration at C-1 in cyclic hemiacetal structure. C. Melting point of a-anomer of gluco

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.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 m

Q.74. The values of pressure equilibrium constant recorded at different temperatures for the following equilibrium reaction have been given below: A(g) B(g) + C(g) [Table: 1/T (K⁻¹) values 0.05, 0.06

Q.75. If the half life of a first order reaction is 6.93 minutes then the time required for completion of 99% of the reaction will be ________ minutes. (Given: log 2 = 0.3010)

Q.71. Consider the following species BrF₅, XeF₆, BF₃, ICl₄⁰, XeF₄, SF₄, NH₃, ClF₃, XeF₂, ICl₂⁰ Number of species having spd hybridized central atom 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.70. Statement I: Sodium dichromate and potassium dichromate are classified as primary standard in titrimetric analysis. Statement II : Phenolphthalein is a weak base, therefore it dissociates in aci

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