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Question
Fill in the following blank with suitable word:
Ethene and ethyne are examples of ..... hydrocarbons.
Solution
Ethene and ethyne are examples of unsaturated hydrocarbons.
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RELATED QUESTIONS
State any four characteristics of a homologous series
Write the next homologue of the following: C2H4
Write the molecular formula of the 2nd and 3rd member of the homologous series where the first member is ethyne.
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
Succeeding members of a homologous series differ by ______.
Distinguish between homologous organs and analogous organs. In which category would you place wings of a bird and wings of a bat? Justify your answer giving a suitable reason.
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 phenomenon in which compounds having different structural formulae have the same molecular formula is called _______.
Complete the following table for homologous series of Alkenes.
| Name | Molecular formula | Condensed structural formula | Number of carbon atom | Number of -CH2- units | Boiling point °C |
| Ethene | C2H4 | CH2 = CH2 | 2 | 0 | -102 |
| Propene | C3H6 | CH3–CH = CH2 | 3 | 1 | -48 |
| 1-Butene | C4H8 | CH3–CH2–CH = CH2 | ______ | ______ | -6.5 |
| 1-Pentene | C5H10 | CH3–CH2–CH2–CH = CH2 | ______ | ______ | 30 |
Name the third homologue of aldehydes.
