3. What is the energy difference in kcal/mol between cis-1,2-dimethylcyclohexane and its trans isome
4. Dieldrin, C12H8Cl6O, is a pentacyclic compound formerly used as an insecticide. How many double b
5. Which of the following is not a major peak in the Mass spectrum of isopentane?(A) 29 (B) 43 (C) 5
7. When compared to the keto form, the enol form of which of the following compounds is most stable?
8. Among the butane conformers, which occur at energy minima on a graph of potential energy versus d
10. Which of the following compounds has the highest boiling point?(A) CH3CH2CH2OH (B) CH3CO2CH3 (C)
11. In the following alkanes, which one has the lowest strain energy?(A) cylopropane (B) cyclobutane
18. Which of the following solvents is best used in IR spectrum?(A) water (B) ether (C) CCl4 (D) THF
20. Using a 60 MHz spectrometer, a chemist observes the following absorption: doublet, J = 7.0 Hz, a
22. The major type of reactions that alkanes undergo is:(A) electrophilic substitution reactions. (B