Which of the following properties of water can be attributed to hydrogen bonding

Question

Which of the following properties of water can be attributed to hydrogen bonding? high melting point high boiling point low vapor pressure high surface tension 1and 3 1, 2, 3, and 4 1, 3, and 4 2, 3, and 4 2 and 3 Which of the following molecular solids will exhibit dipole-dipole intermolecular forces: NH_3, BF_3, I_2, and H_2S? I_2 only NH_3, BF_3, and H_2S NH_3 and H_2S NH_3, BF_3, I_2, and H_2S BF_3 and I_2 What is the overall order of the reaction CO(g) + NO_2(g) rightarrow CO_2(g) + NO(g) if it proceeds via the following rate expression? Delta[CO_2]/Delta t =k[CO][NO_2] second-order fourth-order first-order third-order zero-order

Explanation / Answer

1. The answer is B, hydrogen bonding in water affects all the factors aforementioned. To the hydrogen bonding, water molecules pack its self closely in solid, thus possess high melting point. the high boiling point means, higher temperature is required to break the bonds between the molecule, which are held together by hydrogen bonding. Similarly, lower vapour pressure and high surface tension is also attributed due to the presence of hydrogen bonding

2. The answer is D

3. The answer is A, the reaction follows second order kinetics, as the sum of powers of concentration of CO and NO2 is equal` to 2

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