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प्रश्न
How many structural isomers can you draw for pentane?
उत्तर
Three structural isomers are possible for pentane.
1) \[\ce{CH3 - CH2 - CH2 - CH2 - CH3}\]
2)
\begin{array}{cc}\
\ce{CH3 - CH2 - CH - CH3}\\
\phantom{......}|\\
\phantom{........}\ce{CH3}
\end{array}
3)
\begin{array}{cc}\
\phantom{..}\ce{CH3}\\
|\\
\ce{CH3 - C - CH3}\\
|\\
\phantom{...}\ce{CH3}\\
\end{array}
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संबंधित प्रश्न
‘A’ is an element having four electrons in its outermost orbit. An allotropes ‘B’ of this element is used as a dry lubricant in machinery and in pencil leads. So:
i. Write the name of element ‘A’ and its allotropes.
ii. State whether ‘B’ is a good conductor or non-conductor of electricity?
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An unsaturated hydrocarbon having a triple covalent bond has 50 hydrogen atoms in its molecule. The number of carbon atoms in its molecule will be:
(a) 24
(b) 25
(c) 26
(d) 28
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What is added to groundnut oil when it is to be converted to vanaspati ghee?
Which of the two is better for our health : butter or vegetable oil? Why?
Name the reaction which is usually used in the conversion of vegetables oils to fats. Explain the reaction involved in detail. Write a chemical equation to illustrate your answer.
Which among the following are unsaturated hydrocarbons?
- \[\ce{H3C - CH2 - CH2 - CH3}\]
- \[\ce{H3C - C ≡ C - CH3}\]
- \[\begin{array}{cc}
\ce{H3C - CH - CH3}\\
|\phantom{..}\\
\phantom{.}\ce{CH3}
\end{array}\] - \[\begin{array}{cc}
\ce{H3C - C = CH2}\\
|\phantom{.}\\
\phantom{..}\ce{CH3}
\end{array}\]
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Identify the unsaturated compounds from the following
- Propane
- Propene
- Propyne
- Chloropropane
Which among the following are unsaturated hydrocarbons?
- \[\ce{H3C - CH2 - CH2 - CH3}\]
- \[\ce{H3C - C ≡ C - CH3}\]
- \[\begin{array}{cc}
\ce{H3C - CH - CH3}\\
|\phantom{..}\\
\ce{CH3}\\
\end{array}\] - \[\begin{array}{cc}
\ce{H3C - C = CH2}\\
|\\
\phantom{...}\ce{CH3}\\
\end{array}\]
Identify and name the functional groups present in the following compounds.
- \[\begin{array}{cc}
\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{..}\\
\phantom{}|\phantom{....}|\phantom{....}|\phantom{..}\\
\ce{H - C - C - C - OH}\\
\phantom{}|\phantom{....}|\phantom{....}|\phantom{..}\\
\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{..}\\
\end{array}\] - \[\begin{array}{cc}
\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{....}\\
\phantom{...}|\phantom{....}|\phantom{....}||\phantom{....}\\
\ce{H - C - C - C - OH}\\
\phantom{...}|\phantom{....}|\phantom{.........}\\
\phantom{}\ce{H}\phantom{...}\ce{H}\phantom{.......}\\
\end{array}\] - \[\begin{array}{cc}
\phantom{......}\ce{H}\phantom{....}\ce{H}\phantom{....}\ce{O}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{.......}\\
\phantom{....}|\phantom{....}|\phantom{....}||\phantom{....}|\phantom{....}|\phantom{....}\\
\ce{H} - \ce{C} - \ce{C} - \ce{C} - \ce{C} - \ce{C} - \ce{H}\\
\phantom{....}|\phantom{.....}|\phantom{........}|\phantom{....}|\phantom{....}\\
\phantom{....}\ce{H}\phantom{....}\ce{H}\phantom{........}\ce{H}\phantom{..}\ce{H}\phantom{.....}\\
\end{array}\] - \[\begin{array}{cc}
\phantom{......}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{......}\\
\phantom{....}|\phantom{....}|\phantom{....}|\phantom{....}|\phantom{....}\\
\ce{H - C - C - C = C - H}\\
\phantom{....}|\phantom{....}|\phantom{.............}\\
\phantom{....}\ce{H}\phantom{...}\ce{H}\phantom{.............}
\end{array}\]
A compound X is formed by the reaction of a carboxylic acid C2H4O2 and an alcohol in presence of a few drops of H2SO4. The alcohol on oxidation with alkaline KMnO4 followed by acidification gives the same carboxylic acid as used in this reaction. Give the names and structures of
- carboxylic acid
- alcohol and
- the compound X.
Also write the reaction.
Name the reaction which is commonly used in the conversion of vegetable oils to fats. Explain the reaction involved in detail.
Draw the electron dot structure for ethyne.
