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प्रश्न
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?
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उत्तर
The general formula of the homologous series of the compound -OH group is CnH2n+1OH.
The two consecutive homologous are: Methanol (CH3OH) and ethanol (C2H5OH).
- As the molecular mass increases in homologous series, the boiling point also increases.
- The solubility of an organic compound decreases with increase in molecular mass.
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संबंधित प्रश्न
What is a homologous series?
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)______ |
By how many carbon atoms and hydrogen atoms do any two adjacent homologues differ?
The molecular formula of an organic compound is C18H36. Name its homologous series.
Give the abbreviated formula of the third member of the alcohol.
Define homologous series of organic compounds. List its two characteristics. Write the name and formula of the first member of the series of alkenes.
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 |
Successive members of a homologous series vary by how many atomic mass unit?
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’.
Name the third homologue of alcohols.
