Advertisements
Advertisements
प्रश्न
Name the third homologue of alcohols.
उत्तर
Propanol, which has the chemical formula C3H7OH, is the third homologue of an alcohol. It has a three-carbon straight chain with a hydroxyl (-OH) group joined to the second carbon.
APPEARS IN
संबंधित प्रश्न
State any four characteristics of a homologous series
Write the next homologue of the following: C2H4
Give the molecular formula of one homologue of the following:
C3H6
Define a homologous series. Give the name and structural formula of one homologue of the following:
CH3OH
Propane and ethane are ______.
Two statements are given - one labeled Assertion (A) and the other labeled Reason (R).
Assertion (A): In a homologous series of alcohols, the formula for the second member is C2H5OH and the third member is C3H7OH.
Reason (R): The difference between the molecular masses of the two consecutive members of a homologous series is 144.
The unsaturated hydrocarbons containing a carbon-carbon double bond are called _______.
Cyclohexane : Cyclic hydrocarbon : : Isobutylene : _______
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 |
Consider the following molecular formulae of carbon compounds:
(i) CH3COOH (ii) CH3OH (iii) C2H6 (iv) C3H4 (v) C4H8
- Which one of these compounds belongs to homologous series of alcohols?
- Identify the compound having triple bond between carbon-carbon atoms.
- Write the molecular formula of the first member of the homologous series to which CH3COOH belongs.
- Write the general formula of the series to which the compound C4H8 belongs.
