Blog

13. The R group of a particular Grignard’s reagent is an un-branched alkyl chain with n carbons. How many chiral carbons do you expect the product to have if this […]

12. The standard enthalpy of formation at 298 K for methane is -74.8 kJ mol–1. What additional information is required to determine the average energy for C–H bond formation? a. […]

11. You are observing a chemical reaction (𝑅 → 𝑃) either in the absence or presence of an enzyme catalyst, which has 𝐾M = 106 𝜇𝑀. At equilibrium 20 moles […]

10. What is the role of sulphur in the vulcanization of rubber? a. It acts as a catalyst for the reaction, thereby accelerating its rate b. It participates in di-sulphide […]

9. Which substance is expected to exhibit the greatest surface tension at 25°C? a. CH3OCH3 b. C2H5OH c. CH3CH(OH)CH3 d. CH2(OH)CH2OH CH2(OH)CH2OH exhibits the greatest surface tension at 25°C among […]

8. Which one of the following is true? Ionization potential a. is the energy required to remove an electron from the innermost shell of an atom b. is the ability […]

7. Which one of the following is correct order of basic strength? a. CN- > HCO3- > ClO4- > HS- b. CN- > HS- > HCO3- > ClO4- c. CN- […]

6. Upon ozonolysis which one of the following compounds can produce acetone? a. 3-methyl-1-butene b. cyclopentane c. 2-methyl-2-butene d. 2-methyl-1-butene The correct answer is c. 2-methyl-2-butene, as it yields acetone (propan-2-one) […]

5. Glycerol is more viscous than ethanol because: a. It can make more H bonds per molecule than ethanol b. Due to its tendency to form polymers c. Its molecular […]

4. The percentage (%) increase in the rate of a chemical reaction will be maximum when the temperature is increased from: a. 270 K to 280 K b. 280 K […]