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Define a Functional Group with Two Examples. Write the Functional Groups for (I) Alcohol (Ii) Ketone (Iii) Carboxylic Acid

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Question

Define a functional group with two examples. write the Functional groups for
(i) Alcohol
(ii) Ketone
(iii) Carboxylic acid

Answer in Brief
Short/Brief Note
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Solution

A functional group may be defined as an atom or group of atoms present in a molecule which largely determines its chemical properties.

For Example: -OH- Alcohol, -CHO- Aldehyde

Functional group of:

(i) Alcohol: -OH
(ii) Ketone:  >C=O
(iii) Carboxylic acid:  -COOH





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Chapter 11.1: Organic Compounds - Exercise [Page 269]

APPEARS IN

Frank Chemistry Part 2 [English] Class 10 ICSE
Chapter 11.1 Organic Compounds
Exercise | Q 14 | Page 269
Frank Chemistry Part 2 [English] Class 10 ICSE
Chapter 11.1 Organic Compounds
Exercise | Q 15 | Page 269

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\[\begin{array}{cc}
\phantom{......}\ce{H}\phantom{..}\ce{H}\phantom{..}\ce{H}\phantom{........}\\
\phantom{}|\phantom{...}|\phantom{...}|\phantom{..}\\
\ce{H-C-C-C-OH}\\
\phantom{}|\phantom{...}|\phantom{...}|\phantom{..}\\
\phantom{......}\ce{H}\phantom{..}\ce{H}\phantom{..}\ce{H}\phantom{........}\\
\end{array}\]


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The structures of six organic compounds are shown:

A

\[\begin{array}{cc}
\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\\
|\phantom{....}|\phantom{....}|\phantom{....}|\\
\ce{H - C - C = C - C - H}\\
|\phantom{.............}|\\
\ce{H}\phantom{............}\ce{H}
\end{array}\]

B

\[\begin{array}{cc}
\phantom{.......}\ce{H}\phantom{.....}\ce{O}\\
\phantom{.......}|\phantom{.....}//\\
\ce{H - C - C}\\
\phantom{......}|\phantom{.....}\backslash\\
\phantom{...........}\ce{H}\phantom{.....}\ce{O - H}
\end{array}\]

C

\[\begin{array}{cc}
\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\\
|\phantom{....}|\phantom{....}|\phantom{....}|\\
\ce{H - C - C - C - C - H}\\
|\phantom{....}|\phantom{....}|\phantom{....}|\\
\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}
\end{array}\]

D

\[\begin{array}{cc}
\ce{H}\phantom{...}\ce{H}\\
|\phantom{....}|\\
\ce{H - C - C - H}\\
|\phantom{....}|\\
\ce{H}\phantom{...}\ce{O}\\
\phantom{.......}\backslash\\
\phantom{.........}\ce{H}
\end{array}\]

E

\[\begin{array}{cc}
\ce{H}\\
|\\
\ce{H - C - H}\\
\ce{H}\phantom{....}\phantom{....}\ce{H}\\
|\phantom{....}|\phantom{....}|\\
\ce{H - C - C - C - H}\\
|\phantom{....}|\phantom{....}|\\
\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}
\end{array}\]

F

\[\begin{array}{cc}
\ce{H}\phantom{...}\ce{H}\\
|\phantom{....}|\\
\ce{C = C}\\
|\phantom{....}|\\
\ce{H}\phantom{...}\ce{H}
\end{array}\]

  1. Identify two of the compounds that are members of the same homologous series but are not isomers.
  2. Which two compounds are isomers of each other?
  3. F can be prepared from D. Give a chemical equation for the reaction.

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