Page 5 19. Select the hybridized atomie orbital d. Iv e. v 20. Which of the foll

Question

Page 5 19. Select the hybridized atomie orbital d. Iv e. v 20. Which of the following structures represent compounds that are constitutional isomers of each other? a. I and II b. I and III c. I, II, and III d. I, II, III, and IV e. II and II)I 21. A group of acids arranged in order of decreasing acidity is: What is the arrangement of the conjugate bases of these compounds in decreasing order of basicity? e. No prediction of relative base strength is possible 22. The greatest degree of ionic character is anticipated for the bond between: a. H and C b. H and cl c. C and c d. H and Br e. Br and cl 23. According to the Lewis definition, a base is a(n a. Proton donor b. Electron pair donor c. Hydroxide ion donor. d. Hydrogen ion donor e. Electron pair acceptor

Explanation / Answer

19) option C is correct

Explanation: The combination of positive and negative orbitals will form a molecular orbital.

20) compounds I, II and III are constitutional isomers. option C is correct.

Explanation: compounds having same molecular formula but differ in arrangement of atoms are called constitutional isomers.

21) option D is correct

Explanation: The conjugate base of strong acid is weak. so the conjugate base of strong acid, HNO3 is weak.

22) Option B is correct

Explanation: Cl is more electronegative and H is least electronegative so there is a greater electronegative difference between H and Cl so they form ionic bond

23) option B is correct

Explanation: According to Lewis acid-base pair theory, an electron pair donor is called a base.

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