Describe the following:Decarboxylation. from Chemistry Aldehyde
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    Aldehydes, Ketones and Carboxylic Acids

    Multiple Choice QuestionsShort Answer Type

    251. Describe the following:
    Cross aldol condensation
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    252. Describe the following:
    Decarboxylation.

    Carboxylic acids lose carbon dioxide to form hydrocarbons when their sodium salts are heated with sodalime(NaOH and CaO in the ration of 3:1). The reaction is known as decarboxylation. 
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    253. Complete each synthesis by giving missing starting material, reagent or products.
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    254. Complete each synthesis by giving missing starting material, reagent or products.
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    255. Complete each synthesis by giving missing starting material, reagent or products.

    begin mathsize 14px style bold C subscript bold 6 bold H subscript bold 5 bold CHO bold space bold rightwards arrow with bold H subscript bold 2 bold NCONHNH subscript bold 2 on top end style
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    256. Complete each synthesis by giving missing starting material, reagent or products.
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    257. Complete each synthesis by giving missing starting material, reagent or products.

     
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    258. Complete each synthesis by giving missing starting material, reagent or products.


     
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    259. Complete each synthesis by giving missing starting material, reagent or products.

    begin mathsize 16px style bold C subscript bold 6 bold H subscript bold 5 bold CHO bold space bold plus bold space bold CH subscript bold 3 bold CH subscript bold 2 bold CHO bold space bold rightwards arrow from bold increment to bold dil bold. bold NaOH of end style
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    260. Complete each synthesis by giving missing starting material, reagent or products.

    space CH subscript 3 COCH subscript 2 COOC subscript 2 straight H subscript 5 space rightwards arrow from left parenthesis ii right parenthesis space straight H to the power of plus to left parenthesis straight i right parenthesis space NaBH subscript 4 of
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