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Completely anhydrous acetic acid has mol...

Completely anhydrous acetic acid has molecular mass of 120. Explain.

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In the vapour state, acetic acid exists as a dimer due to intermolecular hydrogen bonding. Therefore, its molecular mass is 120. For details consult section 16.
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Explore conceptually related problems

Completely anhydrous acetic has molecular mass of 120. Explain.

A compound containing only carbon, hydrogen and oxygen has molecular mass of 44.0. On complete oxidation, it is converted into a compound of molecular mass 60.0. The compound is :

Anhydrous formic acid is prepared by:

(a) What is glacial acid and why is it called so ? (b) What is vinegar and how is it prepared ? ( c) The experimentally determined (by colligative properties method) molecular weight of acetic acid in the vapour state is 120 . Explain why.

Statement -1: Acetic acid has a molecular weight of 120 in benzene solution. Statement -2: There is dimer formation by H-bonding.

Knowledge Check

  • Anhydrous formic acid is prepared by

    A
    heating NaOH with CO at `210^@C` under pressure
    B
    heating glycerol with oxalic acid at high temperature
    C
    catalytic oxidation of ethane in presence of a catalyst
    D
    heating lead formate in a current of hydrogen sulphide.

  • A compound containing only carbon, hydrogen and oxygen has molecular mass of 44.0. On complete oxidation, it is converted into a compound of molecular mass 60.0. The compound is :

    A
    an aldehyde
    B
    an acid
    C
    an alcohol
    D
    an ether.

  • Anhydrous formic acid is prepared by:

    A
    heating NaOH with CO at 483K under pressure
    B
    heating glycerol with oxalic acid at high temperature
    C
    catalytic oxidation of ethane in presence of a catalyst
    D
    heating lead formate in a current of hydrogen sulphide
    • DINESH PUBLICATION-CARBOXYLIC ACIDS -QUESTIONS FROM BOARD EXAMINATIONS
    1. Completely anhydrous acetic acid has molecular mass of 120. Explain.

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    2. How will you convert benzene to benzoic acid ?

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    3. Why is benzoic acid a stronger acid than acetic acid ?

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    4. Give a chemical test to distinguish between propanal and propanoic aci...

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    5. Give two chemical tests to distinguish between benzaldehyde and benzoi...

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    6. How will you convert acetic acid to methylamine ?

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    7. Complete the reaction : CH(3)COOH+PCl(5)rarr

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    8. Give chemical equation for Fischer esterification reaction.

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    9. How will you convert benzoic acid to benzamide ?

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    10. Write IUPAC name of the compound

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    11. Why has monochloroethanoic acid higher pK(a) value than dichloroethano...

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    12. Why is ethanoic acid weaker acid than benzoic acid ?

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    13. Write IUPAC name of CH(3)-underset(Cl)underset(|)(CH)-underset(COOH)un...

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    14. Give the formulae of [A] and [B] CH(3)MgBr+CO(2)overset((i)"Dry ethe...

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    15. Give the formula of [A] and [B] CH(3)-overset(O)overset(||)C-OHovers...

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    16. How will you convert acetic acid into acetaldehyde ?

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    17. Write the IUPAC name of CH(3)-CequivC-CH=CH-overset(O)overset(||)C-OH

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    18. How will you prepare benzoic acid from ethyl benzene ?

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    19. Complete the following :

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    20. Write chemical equation to illustrate Hell-Volhard-Zelinsky reaction.

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