Advertisements
Advertisements
प्रश्न
Write the first four members of the homologous series that begins with CH3CHO. Also, write down their general molecular formula.
Advertisements
उत्तर
| No. | Name of compound and molecular formula | Structural formula |
| 1. | Acetaldehyde (CH3CHO) |
\[\begin{array}{cc}\phantom{...}\ce{O}\\ |
| 2. | Propionaldehyde (C2H5CHO) | \[\begin{array}{cc}\phantom{..........}\ce{O}\\ \phantom{..........}||\\\ce{H3C - CH2 - C - H}\end{array}\] |
| 3. | Butyraldehyde (C3H7CHO) | \[\begin{array}{cc}\phantom{.................}\ce{O}\\ \phantom{.................}||\\\ce{H3C - CH2 - CH2 - C - H}\end{array}\] |
| 4. | Valeraldehyde (C4H9CHO) | \[\begin{array}{cc}\phantom{....................}\ce{O}\\ \phantom{....................}||\\\ce{H3C - (CH2)2 - CH2 - C - H }\end{array}\] |
Comparing these molecular formulae and assigning the number of carbon atoms as ‘n’, the following general formula is deduced: CnH2nO/CnH2n-1CHO (where n = 1,2,3,...)
APPEARS IN
संबंधित प्रश्न
What is meant by homologous series?
Write the first four members of the homologous series that begins with H-C≡C-H. Also, write down their general molecular formula.
Describe the classification of organic compounds based on their structure.
Write a note on homologous series.
Write the molecular formula of the first six members of homologous series of nitro – alkanes.
The reagent used to confirm the presence of five hydroxyl groups in glucose is ____________.
How many 3° carbon atoms are present in 1, 4 dibromo-2-methylpentane?
What is the molecular formula of pyran?
Identify the number of carbon atoms and number of oxygen atoms respectively present in pyran molecule.
Identify the number of carbon atoms and number of oxygen atoms respectively present in furan molecule.
An organic compound 'X' (molecular formula C6H7O2N) has six carbons in a ring system, two double bonds and also a nitro group as a substituent, 'X' is ______.
A and B are:
A pyranose ring consists of a skeleton of ______.
The correct decreasing order of priority for the functional groups of organic compounds in the IUPAC system of nomenclature is ______.
Identify primary, secondary, tertiary, and quaternary carbon in the following compound.
\[\begin{array}{cc}
\ce{CH3}\phantom{..................}\\
|\phantom{....................}\\
\ce{CH3 - C - CH - CH2 - CH2 - CH3}\\
|\phantom{....}|\phantom{................}\\
\ce{CH3} \ce{CH3}\phantom{..............}
\end{array}\]
Identify primary, secondary, tertiary, and quaternary carbon in the following compounds.
\[\begin{array}{cc}
\ce{CH3}\phantom{..................}\\
|\phantom{....................}\\
\ce{CH3 - C - CH - CH2 - CH2 - CH3}\\
\phantom{}|\phantom{....}|\phantom{................}\\
\phantom{.}\ce{CH3\phantom{.}CH3}\phantom{..............}
\end{array}\]
Identify the α - carbons in the following species and give the total number of
\[\ce{CH3 -CH2 -\overset{⊕}{C}H -CH2 -CH3}\]
Identify primary, secondary, tertiary and quaternary carbon in the following compounds.
\[\begin{array}{cc}
\ce{CH3}\phantom{.................}\\
|\phantom{....................}\\
\ce{CH3 - C - CH - CH2 - CH2 - CH3}\\
|\phantom{....}|\phantom{................}\\
\ce{CH3}\ce{CH3}\phantom{..............}
\end{array}\]
Identify primary, secondary, tertiary and quaternary carbon in the following compound.
\[\begin{array}{cc}
\ce{CH3}\phantom{..................}\\
|\phantom{....................}\\
\ce{CH3 - C - CH - CH2 - CH2 - CH3}\\
|\phantom{....}|\phantom{................}\\
\ce{CH3}\phantom{.}\ce{CH3}\phantom{..............}
\end{array}\]
Identify primary, secondary, tertiary and quaternary carbon in the following compound.
\begin{array}{cc}
\ce{CH3}\phantom{..................}\\
|\phantom{....................}\\
\ce{CH3 - C - CH - CH2 - CH2 - CH3}\\
|\phantom{....}|\phantom{................}\\
\ce{CH3}\ce{CH3}\phantom{..............}
\end{array}
Indicate the σ and π bonds in the following molecule:
\[\ce{HCONHCH3}\]
Identify the α-carbons in the following species and give the total number of α-hydrogen.
\[\ce{CH2 = CH - CH2 - CH3}\]
Identify primary, secondary, tertiary and quaternary carbon in the following compound:
\[\begin{array}{cc}
\ce{CH3}\phantom{.................}\\
|\phantom{....................}\\
\ce{CH3 - C - CH - CH2 - CH2 - CH3}\\
|\phantom{....}|\phantom{................}\\
\ce{CH3}\phantom{.}\ce{CH3}\phantom{..............}\\
\end{array}\]
Identify primary, secondary, tertiary and quaternary carbon in the following compound.
\[\begin{array}{cc}
\ce{CH3}\phantom{.................}\\
|\phantom{....................}\\
\ce{CH3 - C - CH - CH2 - CH2 - CH3}\\
|\phantom{....}|\phantom{................}\\
\ce{CH3}\phantom{.}\ce{CH3}\phantom{..............}
\end{array}\]
