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प्रश्न
Define Catenation.
उत्तर
Catenation: The remarkable property of carbon atoms to form bonds with each other and give rise to a single large structure or chain is called catenation.
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संबंधित प्रश्न
Give a chemical test to distinguish between saturated and unsaturated hydrocarbons.
A compound 'X' on heating with excess conc. sulphuric acid at 443 K gives an unsaturated compound 'Y'. 'X' also reacts with sodium metal to evolve a colourless gas 'Z'. Identify 'X', 'Y' and 'Z'. Write the equation of the chemical reaction of formation of 'Y' and also write the role of sulphuric acid in the reaction.
Fill in the following blank with suitable word:
Ethyne has ......... carbon-hydrogen single bonds.
Giving their structures, state the number of single bonds, double bonds and triple bonds (if any) in the following compounds:
ethene
Give the names and structural formulae of one saturated cyclic hydrocarbon and one unsaturated cyclic hydrocarbon.
A cyclic hydrocarbon having carbon-carbon single bonds as well as carbon-carbon double bonds in its molecule is:
(a) C6H12
(b) C6H14
(c) C6H6
(d) C6H10
Which of the following hydrocarbons is unsaturated?
C3H4; C2H6
Which of the following will give addition reaction and why?
C4H10, C2H6, C2H4, CH4, C3H8, C3H4
What happens when vegetable oils are hydrogenated? Name the catalyst used.
A mixture of ethyne (acetylene) and oxygen is burnt for welding. Can you tell why a mixture of ethyne and air is not used?
Name a chemical reaction which is characteristic of unsaturated hydrocarbons (like alkenes and alkynes).
Which of the following hydrocarbons can decolourise bromine water and which cannot? Why?
C6H12, C6H14, C6H10
Differentiate between alkanes and alkenes. Name and draw the structure of one member of each.
Which of the following statements are usually correct for carbon compounds? These
- 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
In which of the following compounds, — OH is the functional group?
Pentane has the molecular formula C5 H12 It has
Which among the following are unsaturated hydrocarbons?
- \[\ce{H3C - CH2 - CH2 - CH3}\]
- \[\ce{H3C - C ≡ C - CH3}\]
- \[\begin{array}{cc}
\ce{H3C - CH - CH3}\\
|\phantom{..}\\
\ce{CH3}\\
\end{array}\] - \[\begin{array}{cc}
\ce{H3C - C = CH2}\\
|\\
\phantom{...}\ce{CH3}\\
\end{array}\]
Name the functional groups present in the following compounds
- CH3 CO CH2 CH2 CH2 CH3
- CH3 CH2 CH2 COOH
- CH3 CH2 CH2 CH2 CHO
- CH3 CH2 OH
Write the name of the following compound
\[\begin{array}{cc}
\phantom{}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{.....}\\
\phantom{}|\phantom{....}|\phantom{....}|\phantom{.....}\\
\ce{H} - \ce{C} - \ce{C} - \ce{C} ≡ \ce{C} - \ce{H}\\
\phantom{}|\phantom{....}|\phantom{..........}\\
\phantom{}\ce{H}\phantom{...}\ce{H}\phantom{..........}\\
\end{array}\]
The formulae of four organic compounds are shown below. Choose the correct option
| A | B | C | D |
| \[\begin{array}{cc} \phantom{.}\ce{H}\phantom{......}\ce{H}\\ \phantom{.}\backslash\phantom{.....}/\\ \ce{C = C}\\ /\phantom{.....}\backslash\\ \ce{H}\phantom{......}\ce{H} \end{array}\] |
\[\begin{array}{cc} \phantom{........}\ce{H}\phantom{.....}\ce{O}\\ \phantom{.......}|\phantom{....}//\\ \ce{H - C - C}\\ \phantom{......}|\phantom{.....}\backslash\\ \phantom{...........}\ce{H}\phantom{.....}\ce{O - H} \end{array}\] |
\[\begin{array}{cc}
|
\[\begin{array}{cc} \ce{H}\phantom{...}\ce{H}\phantom{....}\\ |\phantom{....}|\phantom{....}\\ \ce{H - C - C - O - H}\\ |\phantom{....}|\phantom{.....}\\ \ce{H}\phantom{....}\ce{H}\phantom{.....} \end{array}\] |
