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प्रश्न
An organic compound having the molecular formula C3H6O can exist in the form of two isomers A and B having different functional groups. The isomer A is a liquid which is used as a solvent for nail polish. The isomer B is also a liquid. An aqueous solution of one of the lower homologues of B is used for preserving biological specimens in the laboratory
(a) What is compound A?
(b) Write the electron-dot structure of A.
(c) What is compound B?
(d) Write the electron-dot structure of B.
(e) Name the lower homologue of compound B which is used in preserving biological specimens.
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उत्तर
(a) The isomer A is propanone (acetone).
(b) The electron-dot structure of propanone is::
(c) The isomer B is propanal.
(d)The electron-dot structure of propanal is:
(e) Methanal or formaldehyde is the lower homologue of compound B, which is used to preserve biological specimens.
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संबंधित प्रश्न
What is a homologous series?
What is meant by homologous series of carbon compounds?
Write the name and formula of the 2nd member of homologous series having general formula CnH2n – 2.
Fill in the following blank with suitable word:
Carbon compounds have usually ... melting points and boiling points because they are ...... in nature.
What is the difference between two consecutive homologues:
(1) in terms of molecular mass?
(2) in terms of number and kind of atoms per molecule?
Write the names and formulae for the first three members of the homologous series for chloroalkanes.
Define a homologous series. Give the name and structural formula of one homologue of the following:
CH3OH
Write the molecular formula of the third member of the homologous series of carbon compounds with general formula CnHO2n+1OH.
Succeeding members of a homologous series differ by ______.
.
Define homologous series of organic compounds. List its two characteristics. Write the name and formula of the first member of the series of alkenes.
Write names of first four homologous series of alcohols.
What is a homologous series?
The unsaturated hydrocarbons containing a carbon-carbon double bond are called _______.
Cyclohexane : Cyclic hydrocarbon : : Isobutylene : _______
As one ascends in any homologous series, physical properties change gradually.
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 |
Observe the structural formula and answer the following questions.
- Write the name of the given hydrocarbon.
- The given hydrocarbon is included in which type of hydrocarbon?
- What is the kind of compounds with the above characteristic structure called?
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.
