NEET Chemistry Redox Reactions / रेडॉक्स अभिक्रियाएँ NEET PYQ-Redox Reactions

  • question_answer
    A compound contains atoms of three elements A, B and C. If the oxidation number of A is +2, B is +5, and that of C is -2, the possible formula of the compound is:                                                                              [AIPMT 2000]

    A) \[{{A}_{2}}{{(B{{C}_{3}})}_{2}}\]

    B)                   \[{{A}_{3}}{{(B{{C}_{4}})}_{2}}\]

    C)  \[{{A}_{3}}{{({{B}_{4}}C)}_{2}}\]

    D)                   \[AB{{C}_{2}}\]

    Correct Answer: B

    Solution :

    In \[{{A}_{3}}{{(B{{C}_{4}})}_{2}}\]
                \[3\times O.N.\] of \[A+2\,[O.N.\,of\,B+4\times O.N.\,of\,C]=0\]
                \[3\times (-2)+2\,[+5+4\,\times (-2)]=0\]
                \[+6+2\,[-3]=0\]
                Hence, in the compounds \[{{A}_{3}}{{(B{{C}_{4}})}_{2}},\] the oxidation number of A, B and C are +2, +5 and - 2 respectively.


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