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प्रश्न
Give any two differences between alkanes and alkenes.
उत्तर
Differences between alkanes and alkenes:
| Alkanes | Alkenes |
| Alkanes are saturated hydrocarbons in which the carbon atoms are linked to each other only by single covalent bonds. | Alkenes are unsaturated hydrocarbons in which the valencies of carbon atoms are not fully satisfied by single covalent bonds. |
| They contain only a single bond. | They contain triple bonds. |
| They are chemically less reactive. | They are chemically more reactive. |
| The substitution reaction is a characteristic property of alkanes. | The addition reaction is a characteristic property of alkenes |
| Their general formula is CnH2n + 2. | Their general formula is CnH2n |
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संबंधित प्रश्न
Define Saturated hydrocarbon.
Give a chemical test to distinguish between saturated and unsaturated hydrocarbons.
Why are certain compounds called hydrocarbons? Write the general formula for homologous series of alkanes, alkenes and alkynes and also draw the structure of the first member of each series. Write the name of the reaction that converts alkenes into alkanes and also write a chemical equation to show the necessary conditions for the reaction to occur.
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ethyne
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(a) 24
(b) 25
(c) 26
(d) 28
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C6H12, C6H14, C6H10
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- are good conductors of electricity
- are poor conductors of electricity
- have strong forces of attraction between their molecules
- do not have strong forces of attraction between their molecules
Which of the following is the correct representation of electron dot structure of nitrogen?
Which among the following are unsaturated hydrocarbons?
- \[\ce{H3C - CH2 - CH2 - CH3}\]
- \[\ce{H3C - C ≡ C - CH3}\]
- \[\begin{array}{cc}
\ce{H3C - CH - CH3}\\
|\phantom{..}\\
\ce{CH3}\\
\end{array}\] - \[\begin{array}{cc}
\ce{H3C - C = CH2}\\
|\\
\phantom{...}\ce{CH3}\\
\end{array}\]
The name of the compound CH3 — CH2 — CHO is
Write the name of the following compound
\[\begin{array}{cc}
\phantom{....}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{O}\phantom{......}\\
\phantom{....}|\phantom{....}|\phantom{....}|\phantom{....}|\phantom{....}||\phantom{......}\\
\ce{H} - \ce{C} - \ce{C} - \ce{C} - \ce{C} - \ce{C} - \ce{OH}\\
\phantom{}|\phantom{....}|\phantom{....}|\phantom{....}|\phantom{.......}\\
\phantom{}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{.......}\\
\end{array}\]
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- carboxylic acid
- alcohol and
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Also write the reaction.
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- What is a functional group? Give examples of four different functional groups.
Write the name of the following compound
\[\begin{array}{cc}
\phantom{}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{.....}\\
\phantom{}|\phantom{....}|\phantom{....}|\phantom{.....}\\
\ce{H} - \ce{C} - \ce{C} - \ce{C} ≡ \ce{C} - \ce{H}\\
\phantom{}|\phantom{....}|\phantom{..........}\\
\phantom{}\ce{H}\phantom{...}\ce{H}\phantom{..........}\\
\end{array}\]
Write the name of the following compound
\[\begin{array}{cc}
\phantom{}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{..}\\
\phantom{}|\phantom{....}|\phantom{....}|\phantom{....}|\phantom{....}|\phantom{..}\\
\ce{H - C - C - C - C - C - OH}\\
\phantom{}|\phantom{....}|\phantom{....}|\phantom{....}|\phantom{....}|\phantom{..}\\
\phantom{}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{..}
\end{array}\]
