Engineering Questions — Chemistry — JEE Main

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.59. Given below are two statements : Statement-I : Aluminium is more electropositive than thallium as the standard electrode potential value of is negative and is positive. Statement-II: The sum o

Q.74. Identify the metal ions among Co²⁺, Ni²⁺, Fe²⁺, V³⁺ and Ti²⁺ having a spin-only magnetic moment value more than 3.0 BM. The sum of unpaired electrons present in the high spin octahedral complexe

Q.52. Match List-I with List-II. List-I (Pair of Compounds) A. 2-Methylpropene and but-1-ene B. Cis-but-2-ene and trans-but-2-ene C. 2-Butanol and diethyl ether D. But-1-ene and but-2-ene List-II (Typ

Q.51. The correct order of total number of atoms of present in (A) 2 moles of cyclohexane (B) 684 g of sucrose (C) 90.8 L of dihydrogen at STP (1) C > A > B (2) C > B > A (3) B > C > A (4) B > A C

Q.64. The correct increasing order of C – H(A), C – O(B), C = O(C) and C N(D) bonds in terms of covalent bond length is:

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.70. On heating a mixture of common salt and K₂Cr₂O₇ in equal amount along with concentrated H₂SO₄ in a test tube, a gas is evolved. Formula of the gas evolved and oxidation state of the central meta

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