21. Which of the following has the bonds ranked in correct order in tems of pola

Question

21. Which of the following has the bonds ranked in correct order in tems of polarity, from the mo polar to the least polar? (bonds: O-S, N-H, F-S. O-H, and N-Br Electronegativity values F-40 o-3.5. N a. F-S, O-H, O-S, N-H, N-Br 30. Br#28,s-25,Hs21 b. O-H, F-S, O-S, N-Br, N-H e. None of the above is correct 22. Which of the following statements regarding covalent bonds is faise? a. Double bonds are formed from two atoms sharing two pairs of electrons. b. Triple bonds are formed from two atoms sharing three pairs of electrons c. Double bonds form mostly from C, N, O, and S atoms. d. Triple bonds form mostly from C, N, and O atoms. e. Single bonds are formed from two atoms sharing one pair of electrons, and some atoms capable of forming single bonds are H, F, Cl, O, S. C. and N. 23. In the Lewis electron dot structure for the Na molecule, which of the following statementss false? a. The two nitrogen atoms share three pairs of electrons b. The total number of valence electrons is ten. c. Each nitrogen atom has one lone pair of electrons d. The bond order for the nitrogen-nitrogen bond is two. e. More than one of the above is false.

Explanation / Answer

21. Option A.

F-S (1.5)>O-H (1.4)>O-S(1.0)>N-H(0.9)>N-Br (0.2)

22. Option D.

Because O can't form a triple bond, as its valency in 2 so it can for a maximum of a double bond.

23. Option D

N2 has the bond order of 3

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