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Three separate cylinders contain metha...

Three separate cylinders contain methane, ethylene & acetylene respectively. How will you identify them ?

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The three gases are first separately passed through ammoniacal solution of cuprous chloride. The gas, which gives red precipitate, is acetylene. The gases in the remaining two cylinders are separately passed through a solution of bromine in `C""Cl_4` . The gas, which decolourises the reddish -brown solution of bromine , is ethylene . Hence the remaining gas in the other cylinder is methane.
`HC-=CH+Cu_2Cl_2overset(NH_4OH)toCuC-=C""Cudarr("red ppt.")`
`CH_2=CH_2overset(Br_2//C""Cl_4)underset(("reddish-brown"))toBrCH_2Br("colourless")`
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CHHAYA PUBLICATION-HYDROCARBONS-(QUESTION-ANSWER ZONE FOR BOARD EXAMINATION (Short answer type)
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  2. An alkane (molecular mass 72) produces only one monochloro derivative....

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  3. Three separate cylinders contain methane, ethylene & acetylene respe...

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  4. Give example of an alkene which on oxidation by acidic solution of KM...

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  5. C2H2overset(Hg^(2+))underset(dil.H2SO4)toAoverset(H2)underset(Ni)toBov...

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  6. Acetylene does not react with NaOH or KOH even though it possesses aci...

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  7. Write the products obtained when propynide ion (CH3C-=overset(Theta)C"...

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  8. Write the products obtained when propynide ion (CH3C-=overset(Theta)C"...

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  9. Write the products obtained when propynide ion (CH3C-=overset(Theta)C"...

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  10. Write the products obtained when propynide ion (CH3C-=overset(Theta)C"...

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  11. Write the products obtained when propynide ion (CH3C-=overset(Theta)C"...

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  12. Write the name of the products obtained in the following cases . CH...

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  13. Write the name of the products obtained in the following cases . C6...

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  14. How can allyl chloride be prepared from 1-propanol ?

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  15. trans-pent -2-ene is polar but trans-but -2-ene is non-polar- why ?

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  16. Convert acetylene into but-2-ene.

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  17. Ozonolysis of an alkene leads to the formation of an aldehyde and an i...

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  18. An alkene having molecular formula, C4H8 reacts with HBr to form a ter...

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  19. Carry out the following transformation (in two steps): Methyl acetylen...

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  20. How can butan -2-one be prepared from acetylene ?

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