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Consider the reaction (CH3)(C2H5)(C6H5)C–Br+  KOH (aq) → (CH3)(C2H5)(C6H5)C–OH Q.24 The above reaction is an example of Options: (A) addition reaction (B) bimolecular elimination reaction (E2) (C) unimolecular substitution reaction (SN1) […]

The solubility products of FeS, ZnS, CuS and HgS are 1.0 × 10−19, 4.5 × 10−24, 4.0 × 10−38 and 3.0 × 10−53 respectively. Q.23 The concentration of S2−, at […]

The solubility products of FeS, ZnS, CuS and HgS are 1.0 × 10−19, 4.5 × 10−24, 4.0 × 10−38 and 3.0 × 10−53 respectively. Q.22 H2S is passed through an […]

Q.21 The ions with lowest and highest radii among O2−, F−, Na+ and Mg2+ are respectively, Options: (A) Mg2+ and O2− (B) O2− and F− (C) O2− and Mg2+ (D) […]

Q.20 According to crystal field theory, the electronic configuration of [Ti(H2O)6]3+ in the ground state is Options: (A) eg1 t2g0 (B) t2g0 eg1 (C) eg0 t2g1 (D) t2g1 eg0 Electronic […]

Q.19 According to the molecular orbital theory, bond order for H2+ species is Options: (A) 0.5 (B) 1.0 (C) 1.5 (D) 2.0 Bond Order of H2+ – Molecular Orbital Theory […]

Q.18 A molecular electronic excited state has a lifetime of 10−9 s. The uncertainty in measuring the frequency (Hz) of the electronic transition is approximately Options: (A) h⁄4π × 109 […]

Q.17 Consider the following equilibrium: SO2 (g) + ½ O2 (g) ⇌ SO3 (g),   ΔH = −23.5 kcal mol−1 The formation of SO3 is favoured by Options: (A) compression […]

Q.16 The correct order of acidity is Options: (A) C6H5COOH < CH3COOH < C6H5OH < C2H5OH (B) CH3COOH < C6H5COOH < C2H5OH < C6H5OH (C) C2H5OH < C6H5OH < C6H5COOH […]

Q.15 The shape of PCl5 is Options: (A) tetrahedral (B) square planar (C) trigonal bipyramidal (D) square pyramidal PCl5 (phosphorus pentachloride) molecular geometry questions test VSEPR theory and hybridization concepts […]