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प्रश्न
What is a homologous series?
उत्तर
A homologous series is a group of organic compounds having a similar structure and similar chemical properties in which the successive compounds differ by a \[\ce{CH2}\] group.
Example:
\[\ce{HCOOH}\] Methanoic acid
\[\ce{CH3COOH}\] Ethanoic acid
\[\ce{CH3CH2COOH}\] Propanoic acid
APPEARS IN
संबंधित प्रश्न
State any four characteristics of a homologous series
What is meant by homologous series of carbon compounds?
Write the name and formula of the 2nd member of homologous series having general formula CnH2n + 2.
Write the molecular formula of first two members of homologous series having functional group −Br.
Define a homologous series. Give the name and structural formula of one homologue of the following:
CH3OH
Write the molecular formula of the third member of the homologous series of carbon compounds with general formula CnHO2n+1OH.
An organic compound having the molecular formula C3H6O can exist in the form of two isomers A and B having different functional groups. The isomer A is a liquid which is used as a solvent for nail polish. The isomer B is also a liquid. An aqueous solution of one of the lower homologues of B is used for preserving biological specimens in the laboratory
(a) What is compound A?
(b) Write the electron-dot structure of A.
(c) What is compound B?
(d) Write the electron-dot structure of B.
(e) Name the lower homologue of compound B which is used in preserving biological specimens.
Why homologous series of carbon compounds are so called? Write chemical formula of two consecutive members of a homologous series and state the part of these compounds that determines their (i) physical properties, and (ii) chemical properties.
What is the difference in the molecular formula of any two adjacent homologues:
(i) In terms of molecular mass
(ii) In terms of number and kind of atoms per molecule?
Halo alkanes react with alkalies to produce alcohol. Give the equation for the preparation of the second member of the homologous series of alcohol. State under what condition the reaction occurs.
