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7.15: Why is H_{2}O a liquid and H_{2}S a gas?

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 H_{2}O  has oxygen as the centre atom. Oxygen is small in size as well as highly electronegative when we compare it with sulphur. Molecules of water are highly associated through hydrogen bonding, which is not present in sulphur. Molecules of H_{2}S are connected to each other through weak van der Wal force only. Hence, aH_{2}O liquid and H_{2}S a gas.

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Pankaj Sanodiya

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