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प्रश्न
Give a chemical test to distinguish between Saturated and Unsaturated?
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उत्तर
Chemical test to distinguish :
Saturated and Unsaturated
Chemical test:- Bromine water test, if unsaturated hydrocarbons are added to it then the solution turns colourless. The unsaturated hydrocarbon decolourise bromine water. Whereas no change takes place to the solution when saturated hydrocarbons are added to bromine water.
Physical test:- Distinction between saturated and unsaturated hydrocarbons: Saturated hydrocarbons burn in the air with clear (blue) flame, whereas burning of unsaturated hydrocarbons (alkenes and alkynes) gives sooty (yellowish) flame. Saturated hydrocarbons contain less percentage of carbon as compared to unsaturated hydrocarbons; therefore, they get completely oxidised by the oxygen present in the air on burning. Unsaturated hydrocarbons require a lot of oxygen for complete oxidation whose demand is not fulfilled by air. Due to this reason, unsaturated hydrocarbons burn with a sooty flame. The sooty flame contains partially burnt carbon in the form of soot.
संबंधित प्रश्न
Give the general formula of carboxylic acids.
Why are organic compounds studies as a separate branch of chemistry?
Fill in the blank:
Organic compounds are essentially_________compounds. They
show ___________Reaction and their rates are ___________.
(a) What are products obtained when methane reacts with chlorine in
diffused sunlight?
(b) Write the equation when methane reacts with chlorine in diffused sunlight.
(c) Name and define the type of above reaction.
How are addition reactions of ethene different from ethyne?
(a) Draw the structural formula of ethene.
(b) What is the feature of the ethene structure, which allows ethene to react with chlorine in the way it does?
The list of some organic compounds is given below:
ethanol, ethane, methane, ethyne, and ethene
From the above list, name a compound:
- formed by the dehydration of ethanol by concentrated sulphuric acid.
- which forms methanoic acid on oxidation in the presence of copper at 200°C.
- which has vapour density 14 and turns acidic potassium permanganate colourless.
- which forms chloroform on halogenation in the presence of sunlight.
- which decolourises bromine solution in carbon tetrachloride.
Write the equation of the following laboratory preparation:
Ethane from sodium propionate.
Name the organic compound prepared by each of the following reactions:
\[\ce{CaC2 + 2H2O ->}\]
Give chemical equation for:
The laboratory preparation of methane from sodium acetate.
