Blog

13. Two equilibria are shown below: The following is true for these equilibria: a. Both (a) and (b) have equal populations of the isomers b. Both (a) and (b) have […]

11. How many chiral carbons does the following structure have when n is even? a. all its carbons are chiral b. n c. n+1 d. n+2 The correct answer is […]

12. Element X crystallizes into an FCC lattice with cell edge of 200 pm. The density of the element is 5 g/cm3. 200 g of this element contain how many […]

10. The graph below gives an interaction potential between two atoms as a function of the distance between them. What sort of bonds do you expect the two atoms to […]

9. The three pK’s of the amino acid lysine are approximately 2.1, 9.2 and 10.8. Which of the following is true in an electrophoresis experiment: a. Lysine does not migrate […]

8. The most basic naturally occurring amino acid is: a. lysine b. arginine c. serine d. tryptophan Most Basic Naturally Occurring Amino Acid: Arginine Explained Arginine stands as the most […]

7. Between ethanol, ethylamine and ethanethiol, which is the most nucleophilic: a. ethanol b. ethylamine c. ethanethiol d. Both ethylamine and ethanethiol are equally nucleophilic Ethylamine is the most nucleophilic […]

6. The compound H2NC(CN)=C(CN)NH2 is a tetramer of HCN (hydrocyanic acid). How many geometrical isomers are possible in this compound? a. 1 b. 2 c. 4 d. 6 2 geometrical […]

5. Reactions with positive free energy change (ΔG0>0) can be made to occur by: a. coupling them with exergonic reactions via a common intermediate b. manipulating the concentrations of products […]

4. The pOH of a solution of NaOH is 11.30. [H+] in M of this solution is: a. 5.0 x 10-12 b. 6.2 x 10-8 c. 2.0 x 10-3 d. […]