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प्रश्न
What is meant by a functional group? Explain with an example.
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उत्तर
Functional group: An atom or a group of atoms which determine the properties of an organiccompound is called a functional group.
For example: The alcohol group -OH is also known as an alcoholic group or hydroxyl group. The compounds in which the alcohol group is present are termed as alcohols. The general formula of an alcohol is R-OH (R is an alkyl group) like ethanol which has the molecular formula C2H5OH. All the compounds having this functional group will have similar properties.
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संबंधित प्रश्न
Write the name and structural formula of the compound obtained when ethanol is heated at 443 K with excess of conc. H2SO4. Also write chemical equation for the reaction stating the role of conc. H2SO4 in it.
Write the molecular formula of the 2nd and the 3rd member of the homologous series whose first member is methane.
Fill in the blanks from the choices given within brackets:
The compound formed when ethanol reacts with sodium is____ (sodium ethanoate, sodium ethoxide, sodium propanoate).
Give a balanced equation for the preparation of ethanol from monochloroethane and aq. sodium hydroxide.
State two used of ethanol (other than as a fuel).
What happens when ethanol reacts with ethanoic acid in the presence of a little of concentrated sulphuric acid? Write equation of the reaction involved.
What happens when ethanol is heated with concentrated sulphuric acid at 170°C? Write the equation of the reaction which takes place.
The usual disease caused by the excessive drinking of alcohol over a long period of time is:
(a) diabetes
(b) cataract
(c) cirrhosis
(d) arthritis
With a labelled diagram describe an activity to show the formation of an ester.
Write the equations of chlorination of ethane
Ethanol can be converted to ethene which can be changed to ethane.
Choose the correct word or phrase from the options given below to complete the following sentences:
Converting ethanol to ethene requires the use of_________(Concentrated hydrochloric acid, concentrated nitric cid, concentrated sulphuric acid).
From the given list, name the compound with −OH as part of its structure.
How would you convert ethene into ethane?
Write the molecular formula of the given compound.
Ethanol
C2H5OH + 3O2 → 2CO2 + 3H2O is a ______
What happens when ethanol is heated at 443K in the presence of conc. H2SO4? Write the role of conc. H2SO4 in this case.
Give the balanced chemical equation of the following reaction:
Combustion of ethanol.
Give the balanced chemical equation of the following reaction:
Combustion of ethanol.
Give the balanced chemical equation of the following reaction:
Oxidation of ethanol by acidified potassium dichromate.
