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प्रश्न
Conversion of ethanol to ethene by the action of concentrated sulphuric acid is an example of _________.
विकल्प
Dehydration
Dehydrogenation
Dehydrohalogenation
Hydrolysis
उत्तर
Conversion of ethanol to ethene by the action of concentrated sulphuric acid is an example of dehydration.
Explanation:
Conc. \[\ce{H2SO4}\] is a useful dehydrator since it turns alcohol into an alkene by removing the water molecule.
\[\begin{array}{cc}
\phantom{..}\ce{H\phantom{...}OH}\phantom{..............................}\\
\phantom{}|\phantom{....}|\phantom{..............................}\\
\ce{H - C - C - H ->[Conc.][H2SO4] H - C = C - H + H2O}\\
\phantom{.}|\phantom{....}|\phantom{..................}|\phantom{....}|\phantom{........}\\
\phantom{.}\ce{\underset{Ethanol}{H\phantom{...}H}\phantom{.................}\underset{Ethene}{H\phantom{...}H}}\phantom{........}\end{array}\]
संबंधित प्रश्न
Select from the list the gas that matches the description given in case
[ammonia, ethane, hydrogen chloride, hydrogen sulfide, ethyne]
This gas is also a saturated hydrocarbon
Name the following:
The process by which ethane is obtained from ethane.
Name the following:
A hydrocarbon which contributes towards the greenhouse effect.
Match the options A to E with the statements
| A | Alkyne | 1 | No. of molecules in 22.4 dm-3 of carbon dioxide at STP |
| B | Alkane | 2 | An element with the electronic configuration 2,8,8,3 |
| C | Iron | 3 | CnH2n + 2 |
| D | 6.023 × 1023 | 4 | CnH2n − 2 |
| E | Metal | 5 | The metal which forms two types of ions |
How is ethane prepared in the laboratory?
How is methane prepared from methyl iodide?
Give general formulae of monohydric alcohol?
What is an alkyl group?
Fill in the blanks with the choices given in brackets :
Substitution reactions are characteristic reactions of ____________ (alkynes / alkenes / alkanes)
Give the chemical equation for the laboratory preparation of methane from sodium acetate.
