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प्रश्न
Explain why propanol has higher boiling point than that of the hydrocarbon, butane?
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उत्तर
Propanol and butane have nearly the same molecular mass, but propanol has a higher boiling point because of intermolecular hydrogen bonding between its molecules. In butane, hydrogen bonding is not present due to the absence of the polar −OH group. The molecules of butane are connected by weaker van der Waals attraction forces.
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संबंधित प्रश्न
Give reasons for the following: Butan-1-ol has a higher boiling point than diethyl ether.
Give reasons for the following : Phenol is more acidic than ethanol.
Give reasons for the following : Boiling point of ethanol is higher in comparison to methoxymethane.
Alcohols are comparatively more soluble in water than hydrocarbons of comparable molecular masses. Explain this fact.
Give simple chemical tests to distinguish between the following pairs of compounds :
Ethanol and phenol
Arrange the following compounds in the increasing order of their acid strength:
p-cresol, p-nitrophenol, phenol
Write the structures of A, B and C in the following reactions :
\[ C_6 H_5 {NO}_2 \to^{Sn/HCI} A \to^{{NaNO}_2 /HCI}_{273 K} B \to^{H_2 O}_∆ C\]
Account for the following:
CH3CHO is more reactive than CH3COCH3 towards reaction with HCN.
Which of the following has lowest boiling point?
Explain why alcohols and ethers of comparable molecular mass have different boiling points?
Assertion: Boiling points of alcohols and ethers are high.
Reason: They can form intermolecular hydrogen-bonding.
Assertion (A): Alcohols react both as nucleophiles and electrophiles.
Reason (R): The bond between C–O is broken when alcohols react as nucleophiles.
Select the most appropriate answer from the options given below:
How are the following conversions carried out?
Methyl magnesium bromide → 2 -Methylpropan-2-ol.
Convert the following:
acetaldehyde to isopropyl alcohol.
How are the following conversions carried out?
\[\ce{Methyl magnesium bromide ->2-Methylpropan-2-ol}\]
How is the following conversion carried out?
Methyl magnesium bromide → 2-Methylpropan-2-ol.
How is the following conversions carried out?
\[\ce{Methyl magnesium bromide → 2-Methylpropan-2-ol}\].
