Word Count : 177

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The striking contrast in the boiling points of ethanol (351 K) and dimethyl ether (249 K) is due to the presence of hydrogen bonding in ethanol, which is absent in dimethyl ether. ### Reason: 1. Hydrogen Bonding in Ethanol Ethanol (\(C_2H_5OH\)) contains an \(-OH\) _________ ________ _______ ____ ______ ________.
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