2. Solved Papers
  3. BHU PMT

BHU PMT BHU PMT (Screening) Solved Paper-2011

  • question_answer
    Among\[A{{l}_{2}}{{O}_{3}},Si{{O}_{2}},{{P}_{2}}{{O}_{3}}\]and\[S{{O}_{2}}\]the correct order of acid strength is

    A)  \[{{P}_{2}}{{O}_{3}}<A{{l}_{2}}{{O}_{3}}<Si{{O}_{2}}<S{{O}_{2}}\]

    B)  \[Si{{O}_{2}}<S{{O}_{2}}<A{{l}_{2}}{{O}_{3}}<{{P}_{2}}{{O}_{3}}\]

    C)   \[A{{l}_{2}}{{O}_{3}}<Si{{O}_{2}}<{{P}_{2}}{{O}_{3}}<S{{O}_{2}}\]

    D)  \[S{{O}_{2}}<{{P}_{2}}{{O}_{3}}<Si{{O}_{2}}<A{{l}_{2}}{{O}_{3}}\]

    Correct Answer: C

    Solution :

                     With decrease in size from\[Al\]to S, the basic nature of oxide decrease and acidic nature increases. Hence, the order of acid strength is as \[A{{l}_{2}}{{O}_{3}}<Si{{O}_{2}}<{{P}_{2}}{{O}_{3}}<S{{O}_{2}}\]


You need to login to perform this action.
You will be redirected in 3 sec spinner