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प्रश्न
How is ethylene prepared in laboratory? Give balanced equation and
procedure. How is the gas prepared and dried?
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उत्तर
Ethylene is prepared in the laboratory by dehydration of ethyl alcohol.
Reaction:
\[\ce{CH3Ch2Oh ->[concH2SO4][170°C] CH2 = CH2 + H20}\]
Procedure:
Take one part of ethyl alcohol in a flask. Add two parts of concentrated
sulphuric acid and heat to 170°C.Ethylene is evolved and small amount of aluminium sulphate is also added to the flask to avoid frothing.
Gas is prepared by reacting ethyl alcohol in presence of sulphuric acid and is collected by downward displacement of water.
The gas is dried by passing the gas through sodium hydroxide solution.
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संबंधित प्रश्न
The organic compound which undergoes substitution reaction is :
(A) `C_2H_2`
(B) `C_2H_4`
(C) `C_10H_18`
(D) `C_2H_6`
Give the structural formula of the following functional group:
Ketone
Copy and complete the following sentence:
A saturated hydrocarbon will undergo _______reactions, whereas the typical reaction of an unsaturated hydrocarbon is _______.
Choose the correct answer:
The formation of 1,2 -dibromoethane from ethene and bromine is an example of
Compound A is bubbled through bromine dissolved in carbon tetrachloride, and the product is CH2Br – CH2Br.
\[\ce{A ->[Br2/CCl4] CH2Br - CH2Br}\]
- Draw the structural formula of A.
- What type of reaction has A undergone?
- What is your observation?
- Name (not formula) the compound formed when steam reacts with A in the presence of phosphoric acid.
- What is the procedure for converting the product of (iv) back to A?
Write the equation for the reaction taking place between 1, 2-dibromoethane and alcoholic potassium hydroxide.
Give a chemical test to distinguish between ethane gas and ethane gas.
Write a balanced chemical equation for the following:
Burning of ethane in plentiful supply for air.
Fill in the blank.
The compound formed when ethane reacts with hydrogen is _________ (CH4,C2H6,C3H6).
Give the IUPAC name of the isomer C4H10 which has a branched-chain.
