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12th Grade > Chemistry

CARBOXYLIC ACIDS MCQs

Total Questions : 15 | Page 2 of 2 pages
Question 11.
  1.    Benzoic acid
  2.    Cinnamaldehyde
  3.    Cinnamic acid
  4.    Picric acid
 Discuss Question
Answer: Option B. -> Cinnamaldehyde
:
B
'A' is C6H5COCl ; A to B is Rosenmund's reduction and B to C Claisen condensation
Question 12. Acetic acid exists as 'X' in vapour state and 'Y' in the liquid state. 'X' and 'Y' are
  1.    Dimer, Polymer
  2.    Trimer, Polymer
  3.    Hexamer, Polymer
  4.    Trimer, Dimer
 Discuss Question
Answer: Option A. -> Dimer, Polymer
:
A
In vapour 2 molecules are found together due to inter molecular hydrogen bond & in liquid many molecules are found together due to inter molecular hydrogen bond
Question 13.
  1.    H2 / Pt
  2.    H2 / Pd - BaSO4
  3.    Cr2O7-2 / H+
  4.    Zn - Hg / HCl
 Discuss Question
Answer: Option B. -> H2 / Pd - BaSO4
:
B
Formation of Y is Rosenmund's reduction
Question 14. Carboxylic acids are more acidic than phenols, because
  1.    The resonance structures of acid are equivalent while those of phenols are non equivalent
  2.    In resonance structures of phenols negative charge is on more electro positive carbon while   in those of acid it is more electro negative oxygen
  3.    None
  4.    (a) and (b) above.
 Discuss Question
Answer: Option D. -> (a) and (b) above.
:
D
Both a & b plays role in more acidic nature of acids
Question 15.
 Discuss Question
Answer: Option D. -> (a) and (b) above.
:
C
The type acid depends upon R group of Grignard
reagent

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