16. Dipole-Dipole forces are stronger than London forces because a. London force

Question

16. Dipole-Dipole forces are stronger than London forces because a. London forces have weaker dipoles b. London forces have higher boiling points c. London forces are formed between dipole-ionic forces d. None of the above 17. Hydrogen bonds happen wher a. Hydrogen is released in solution b. Between hydrogen and Carbon c. Between hydrogen and Nitrogen d. All of the above 18. All the following potassium salts participate in gas evolution reactions except a. potassium sulfite b. Potassium hydroxide c. Potassium sulfide d. Potassium carbonate

Explanation / Answer

16) London forces result from temporary dipoles which result when electrons in adjacent atoms acquire temporary dipoles. Such temporary dipoles are far weaker than actual permanent dipoles and hence, London forces are weaker than dipole-dipole forces. Therefore, (a) is the correct answer.

17) Hydrogen bonds are formed between hydrogen atom attached to a highly electronegative atom like N, O and F and an adjacent N, O or F atom. Therefore, (c) is the correct answer.

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