Which of the following has maximum boiling point?

H O - C H_{2} - C H_{2} - O H

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H_{3} - C H - C H_{2} - C H_{2} O H

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H_{2} O

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H_{3} C - C H_{2} - C H_{2} - C H_{3}

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Solution

The correct option is A $H O - C H_{2} - C H_{2} - O H$
The boiling point depends on molecular mass. The boiling point of compounds is directly proportional to the molecular mass of the compound. Greater the molecular mass higher will be the boiling point.

A) $62$ $Molecular mass (C_{2} H_{6} O_{2}) = 2 \times 12 + 1 \times 6 + 2 \times 16 = 62$

B) $Molecular mass (C_{3} H_{9} O) = 3 \times 12 + 1 \times 9 + 1 \times 16 = 60$

C) $Molecular mass (H_{2} O) = 1 \times 2 + 1 \times 16 = 18$

D). $Molecular mass (C_{4} H_{10}) = 4 \times 12 + 10 \times 1 = 58$

So Option A is the correct answer as it has the highest molecular weight.

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