Home
Class 12
CHEMISTRY
How will you isolate CH(4) , C(2) H(4) a...

How will you isolate `CH_(4) , C_(2) H_(4) and C_(2) H_(2)` from their mixtures ?

Text Solution

Verified by Experts

1 The mixture of methane `(CH_(4))` , ethylene `(C_(2)H_(4))` and acetylene `(C_(2)H_(2))` gases is at first passed through ammoniacal `Cu_(2) Cl_(2)` solution . Acetylene is absorbed in ammoniacal `Cu_(2)Cl_(2)` solution with the formation of red precipitate of cuprous acetylide . Methane and ethylene pass out without undergoing any reaction .
`HC -= CH + Cu_(2) Cl_(2) overset(NH_(4)OH)(to) CuC-= C Cu darr ` (red)
2 The red precipitate is filtered , washed with alcohol and then boiled with concentrated HCl or KCN solution when acetylene gas is evolved . It is dried by `P_(2)O_(5)` and collected .
`CuC-= C Cu + 2 HCl to HC -= CH uarr + Cu_(2) Cl_(2)`
3 The gas mixture (`CH_(4)` and `C_(2)H_(4)` ) which escapes is then passed through fuming sulphuric acid . `CH_(4)` comes out without any reaction . It is collected after removing acid vapours by passing through KOH . Ethylene reacts with fuming sulphuric acid to form ethyl hydrogen sulphate which when heated at `170^(@)C` liberates ethylene gas . It is collected after removing acid vapours by passing through KOH .
`H_(2) C = CH_(2) + H_(2)SO_(4) to CH_(3) CH_(2) OSO_(3) H CH_(3) CH_(2) OSO_(3) H overeset( 170^(@) C)(to) CH_(2) = CH_(2) uarr + H_(2)SO_(4)`
Promotional Banner

Topper's Solved these Questions

  • MODEL QUESTIONS PAPER

    CHHAYA PUBLICATION|Exercise SET II SECTION I|11 Videos

  • MODEL QUESTIONS PAPER

    CHHAYA PUBLICATION|Exercise SET II ( SECTION II ) ( GROUP A)|6 Videos

  • MODEL QUESTIONS PAPER

    CHHAYA PUBLICATION|Exercise SET I (SECTION II ) (GROUP C)|21 Videos

  • MODEL QUESTION PAPER

    CHHAYA PUBLICATION|Exercise Answer the following question (set-3)|130 Videos

  • ORGANIC CHEMISTRY : BASIC PRINCIPLES AND TECHNIQUES

    CHHAYA PUBLICATION|Exercise WARM UP EXERICSE|132 Videos

Similar Questions

Explore conceptually related problems

How will you convert C_(2)H_(5)OH" to "C_(2)H_(5)OC_(2)H_(5) ?

Find the ratio of the masses of equal volumes of CH_(4), C_(2)H_(4) and C_(2)H_(2) gases under the same temperature and pressure.

CH_(4),C_(2)H_(6),C_(3)H_(6) compounds belong to

10 mL of a mixture of CH_(4),C_(2)H_(4) and CO_(2) was exploded with excess oxygen. After explosion, there ws a contraction of 17 mL on cooling and there was a further contraction of 14 mL on treatment with KOH. Find out the composition of the mixture.

Draw diagram showing the formation of a double bond and a triple bond between carbon atoms in C_(2)H_(4) and C_(2)H_(2) molecules.

Give the IUPAC name of CH_(3) CH Br CH_(2) CO O C_(2) H_(5)

Assertion : The major product formed by heating C_(6)H_(5)CH_(2)OC_(2)H_(5) with HI are C_(6)H_(5)CH_(2)I and C_(2)H_(5)OH. Reason : Benzyl cation is more stale than ethyl cation.

How can you prepare dilute H_(2)SO_(4) concentrated H_(2)SO_(4) in the laboratory?

A closed vessel holds a gas mixture consisting of C_(2)H_(6),C_(2)H_(4) and CH_(4) , each with an amount of 2.5 mol. But due to a pinhole is the vessel, the gas mixture undergoes effusion. What will be the order of partial pressures of the gases in the vessel after sometime?