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Carboxylic Acid & Derivatives Test - 7

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Carboxylic Acid & Derivatives Test - 7
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  • Question 1
    1 / -0

    An acyl halide is formed when PCl5​ reacts with an:

    Solution

    An acyl halide is formed when PCl5​ reacts with a carboxylic acid.

    RCOOH + PCl5 ​→ RCOCl + POCl3 ​+ HCl

     

  • Question 2
    1 / -0

    A distinctive and characteristic functional group of fat is

    Solution

    Fats are also known as triglycerides. These triglycerides are the triesters of fatty acid with glycerol. So, the characteristics feature of fat is ester group.

     

  • Question 3
    1 / -0

    In the preparation of an ester, the commonly used dehydrating agent is:

    Solution

     

  • Question 4
    1 / -0

    When urea is heated, it forms biurette, alkaline solution of whichforms ..... with CuSO4​ solution

    Solution

     

  • Question 5
    1 / -0

    Benedict's solution is not reduced by

    Solution

    Benedict's solution is readily reduced by aldehydes. It does not oxidise anhydrides. Glucose contains aldehyde group hence, it also reduced Benedict's solution.

     

  • Question 6
    1 / -0

    A colourless water soluble organic liquid decomposes sodium carbonate and liberates CO2. It produces black ppt with Tollen's reagent. The liquid is

    Solution

    When a colourless water soluble organic liquid decomposes sodium carbonate and liberates CO2, the liquid formed is formic acid. It can be represented as-

    (i) 2H.COOH + Na2CO3 → 2H.COONa + CO2 + H2O 

    (ii) H.COOH + Ag2O → H2O + CO2 + 2Ag

     

  • Question 7
    1 / -0

    Benzoic acid is less acidic than salicylic acid because of

    Solution

    due to intramolecular hydrogen bonding.

     

  • Question 8
    1 / -0

    Formaldehyde and formic acid can be distinguished using

    Solution

     

  • Question 9
    1 / -0

    Reaction between an acid and alcohol will give

    Solution

     

  • Question 10
    1 / -0

    Reaction of acetamide with water is an example of :

    Solution

    Reaction of acetamide with water is an example of  hydrolysis.

    In this reaction, amide group is hydrolyzed to give ammonia and acetic acid.

     

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