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
Draw a formula for the first five members of the homologous series beginning with the given compound.
H–COOH
Draw a formula for the first five members of the homologous series beginning with the given compound.
H–CH=CH2
Identify the functional group in the following compound.
Find out all the functional groups present in the following polyfunctional compound.
Thyroxine, the principal thyroid hormone.
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.
Structure of the compound whose IUPAC name is 5, 6 – dimethylhept - 2 - ene is
Write a note on homologous series.
Write the molecular formula and possible structural formula of the first four members of homologous series of carboxylic acids.
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 ____________.
What is the percentage of carbon in urea?
(Atomic mass C = 12, H = 1, N = 14, O = 16)
Which of the following is a hetero-aromatic benzenoid compound?
Which of the following yields only one type of monosubstituted chloroalkane upon chlorination?
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.
How many primary, secondary and tertiary carbon atoms respectively are present in isobutane?
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:
Identify primary, secondary, tertiary and quaternary carbon in the following compounds.
\[\begin{array}{cc}
\ce{CH3}\phantom{.................}\\
|\phantom{....................}\\
\ce{CH3 - C - CH - CH2 - CH2 - CH3}\\
|\phantom{.....}|\phantom{...............}\\
\ce{CH3}\phantom{..}\ce{CH3}\phantom{.............}
\end{array}\]
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 carbons in the following compound.
\[\begin{array}{cc}
\ce{CH3\phantom{.................}}\\
|\phantom{....................}\\
\ce{CH3 - C - CH - CH2 - CH2 - CH3}\\
|\phantom{....}|\phantom{................}\\
\ce{CH3 CH3\phantom{.............}}
\end{array}\]
Identify primary, secondary, tertiary and quaternary carbon in the following compound.
\[\begin{array}{cc}
\ce{CH3}\phantom{..................}\\
|\phantom{....................}\\
\ce{CH3 - C - CH - CH2 - CH2 - CH3}\\
|\phantom{....}|\phantom{................}\\
\ce{CH3}\ce{CH3}\phantom{..............}
\end{array}\]
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 primary, secondary, tertiary and quaternary carbon in the following compound:
\[\begin{array}{cc}
\ce{CH3}\phantom{.................}\\
|\phantom{....................}\\
\ce{CH3 - C - CH - CH2 - CH2 - CH3}\\
|\phantom{....}|\phantom{................}\\
\ce{CH3}\phantom{.}\ce{CH3}\phantom{..............}\\
\end{array}\]
