10. Which of the following molecules is achiral? ON sC A. I D. 11 and 111 11. Wh

Question

10. Which of the following molecules is achiral? ON sC A. I D. 11 and 111 11. What is the major product of the following reaction? KOH H Ph C. D. 12. Which of the following is true regarding the addition of a strong acid to a conjugated diene? A. The major product formed at low temperatures is the most stable product. The major product formed at high temperatures is the kinetic product. The product of a 1 A-addition is always more stable than the product of a 1 addition. B. C. The major product formed under thermodynamic control is the most stable product 13. Which fundamental step can be found in the mechanism for the following reaction? CHCl3 NaOH CH2Cl2 Homolysis A. Nucleophilic addition C. Electrophilic elimination D. Heterolysis

Explanation / Answer

10. A chiral molecule is one that have four different subsituents on one carbon atom.
In this question, compound I and II are chiral since there are carbons atoms with different substituents. thus a chiral molecles id III and
the answer is option C.

11. The given reacction is elimination reaction where H-atom from carbon atom one and Br-atom from carbon atom 2 are eliminated.
thus the product formed is alkene.
In the given reaction, the product is option B, because stereochemistry of product should be such that larger groups are far away from each other.

12. The addition is regulated by temperature.
At low temp., the kinetic product is favoured that is 1,2 addition takes place.
whereas at high temperature the thermodynamics control the product and 1,4 addition takes place.
thus answer is option D.

13. The reaction of alkene with NaOH is a nucleophillic addition reaction that results into formation of diols.
thus the answer ia option A.

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