Multiple Choice Questions on Which one among the following is the correct order of strength of acids ........ for General Studies (Level 1) Preparation

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Multiple Choice Questions

Which one among the following is the correct order of strength of acids ........

General Science (Easy) Chemistry
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    Which one among the following is the correct order of strength of acids ?

    H2SO4 > H3PO3 > CH3COOH

    Correct Answer

    H3PO3 > H2SO4 > CH3COOH

    Incorrect Answer

    CH3COOH > H3PO3 > H2SO4

    Incorrect Answer

    CH3COOH > H2SO4 > H3PO3

    Incorrect Answer
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    Explanation:

    H2SO4 > H3PO3 > CH3COOH

    Presence of an electron-withdrawing group, (-I showing group) like -CI facilitates the removal of a proton from a carboxylic acid by dispersing the negative charge of the carboxylate ion formed. 

     
    Thus, increases the acidity of the carboxylic acids. More the number of −I showing (electron-withdrawing) groups, more will be the acidity of carboxylic acid. 
     
    Thus, the order of acidic strength is Cl3?CCOOH>Cl2?CHCOOH>ClCH2?COOH>CH3?COOH

    By: Pradeep Kumar
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