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प्रश्न
Right or wrong sentence.
As one ascends in any homogeneous category, physical properties change in one direction.
पर्याय
Right
Wrong
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उत्तर
The given sentence is right.
Explanation:
This statement is correct because in a homologous series, as the carbon chain gets longer and molecular mass increases, physical properties like melting and boiling points show a regular, steady gradation. Because the change in mass is consistent, these physical properties gradually shift in one specific direction.
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संबंधित प्रश्न
What is a homologous series?
Write the molecular formula of two consecutive members of homologous series of aldehydes. State which part of these compounds determines their
- physical and
- chemical properties
Write the molecular formula of first two members of homologous series having functional group – OH
Carbon compounds have usually ______ melting points and boiling points because they are ______ in nature.
Give the molecular formula of one homologue of the following:
C2H6
Give the name and structural formula of one homologue of the following:
CH3OH
The molecular formula of a homologue of butane is ______.
The number of carbon atoms present in the molecule of fifth member of the homologous series of alkynes is ______.
Give the dot diagram of the first member of the alcohol.
The general formula of Alkane is _________________
The unsaturated hydrocarbons containing a carbon-carbon double bond are called _______.
Find the odd one out and give its explanation.
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 |
Complete the following chart by using examples given in brackets.
(isobutylene, cyclohexane, propane, cyclohexene, cyclopentane, benzene, propyne, isobutane, propene)
| Straight chain hydrocarbons | Branched chain hydrocarbons | Cyclic hydrocarbons |
Which of the following pairs can be the successive members of a homologous series?
Successive members of a homologous series vary by how many atomic mass unit?
Name the following organic compound:
The first homologue whose general formula is CnH2n.
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’.
