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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 : Phenol is more acidic than ethanol.
Alcohols are comparatively more soluble in water than hydrocarbons of comparable molecular masses. Explain this fact.
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`CH_3-CH_2-Br"Alcoholic KOH"/""> B " HBR"/"">C"Na/Eather"/"">D`, the Compound D is
(A) ethane
(B) propane
(C) n-butane
(D) n-pentane
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Ethanol and phenol
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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.
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Five alcohol groups
Arrange the following compounds in increasing order of boiling point. Propan-1-ol, butan-1-ol, butan-2-ol, pentan-1-ol
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.
Arrange the following in the increasing order of their property indicated:
ethanol, ethanoic acid, benzoic acid (boiling point)
A solution of phenol in chloroform when treated with aqueous NaOH gives compound P as a major product. The mass percentage of carbon in P is ______. (to the nearest integer) (Atomic mass: C = 12; H = 1; O = 16)
How are the following conversions carried out?
Methyl magnesium bromide → 2 -Methylpropan-2-ol.
Convert the following:
acetaldehyde to isopropyl alcohol.
How is the following conversion carried out?
Methyl magnesium bromide → 2-Methylpropan-2-ol.
How is the following conversion carried out?
\[\ce{Methyl magnesium bromide ->2-Methylpropan-2-ol}\]
