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प्रश्न
Give the dot diagram of the first member of the alcohol.
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उत्तर
Methyl alcohol (CH3OH) is the first member of alcohol. Its electron-dot structure is shown below:
\[\begin{array}{cc}
\ce{H}\phantom{...}\\
\ce{H^\bullet_\bullet\overset{\bullet\bullet}{\underset{\bullet\bullet}{C}}^\bullet_\bullet\overset{\bullet\bullet}{\underset{\bullet\bullet}{O}}^\bullet_\bullet H}\\
\ce{H}\phantom{...}
\end{array}\]
संबंधित प्रश्न
Write the next homologue of the following: C2H4
Complete the following table which relates to the homologous series of hydrocarbons.
|
General Formula |
IUPAC name of the homologous series | Characteristic bond type | IUPAC name of the first member of the series |
| `C_nH_(2n-2)` | (A)________ | (B)______ | (C)______ |
| C_nH_(2n+1) | (B)________ | (E)______ | (F)______ |
Fill in the following blank with suitable word:
Ethene and ethyne are examples of ..... hydrocarbons.
What is the next higher homologue of methanol (CH3OH)?
The number of carbon atoms present in the molecule of fifth member of the homologous series of alkynes is:
(a) four
(b) five
(c) six
(d) seven
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?
While going in an increasing order there is a rise in the molecular mass of the consecutive members of the homologous series by _______.
Complete the following table for homologous series of alcohols.
| Name | Molecular formula | Condensed structural formula | Number of carbon atom | Number of -CH2- units | Boiling point °C |
| Methanol | CH4O | CH3-OH | 1 | 1 | 63 |
| Ethanol | C2H6O | CH3–CH2-OH | 2 | 2 | 78 |
| Propanol | C3H8O | CH3–CH2–CH2-OH | ______ | ______ | 97 |
| Butanol | C4H10O | CH3–CH2–CH2–CH2–OH | ______ | ______ | 118 |
A carbon compound ‘A’ having melting point 156K and boiling point 351K, with molecular formula C2H6O is soluble in water in all proportions.
- Identify ‘A’ and draw its electron dot structure.
- Give the molecular formulae of any two homologues of ‘A’.
Write the chemical formula of two consecutive homologous of organic compounds having functional group - OH.
What happens to the (i) boiling point and (ii) solubility of organic compounds of a homologous series as the molecular mass increases?
