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Q.17 For a particular reaction, the use of a catalyst reduces the activation energy (Ea) to one-third its original value. The ratio of rate constants (kcatalyzed / kuncatalyzed) is: 1 […]

Q.16 Consider the following equilibrium reaction: CO (g) + Cl2 (g) ⇌ COCl2 (g) 0.60 atm of CO and 1.10 atm of Cl2 were mixed in a constant volume reaction […]

Q.15 The compound that is aromatic, among the choices, is: Determining which compound is aromatic is a very important concept in Organic Chemistry. Aromatic compounds show extra stability due to […]

Q.13 Molecule that has no lone pair of electrons on the central atom (among the choices) is: XeF4 PF3 ClF3 BF3 BF3 No Lone Pairs Central Atom XeF4 PF3 ClF3 […]

Q.12 A battery delivers a steady current of 1.25 A for 90 minutes. The total charge ‘Q’ (in Coulomb units) is: 6750 1012.5 112.5 12.5 Battery Charge Calculation: 1.25A 90 […]

Q.11 For a spontaneous process, the total entropy change (ΔSsystem + ΔSsurroundings) is: equal to zero greater than zero less than zero for endothermic process less than zero for exothermic […]

Q.10 Modern warfare has changed from large scale clashes of armies to suppression of civilian populations. Chemical agents that do their work silently appear to be suited to such warfare; […]

Q.9 Hari (H), Gita (G), Irfan (I) and Saira (S) are siblings (i.e., brothers and sisters). All were born on 1st January. The age difference between any two successive siblings […]

Q.8 If 137 + 276 = 435, how much is 731 + 672? 534 1403 1623 1513 731 + 672 Puzzle Solution: Number Pattern Question The correct answer is 1513. […]