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VIT Engineering VIT Engineering Solved Paper-2011

  • question_answer
    \[M{{n}_{2}}{{O}_{7}}\] dissolves in water to give an acid. The colour of the acid is

    A)  green          

    B)  blue

    C)  purple         

    D)  red

    Correct Answer: C

    Solution :

     \[M{{n}_{2}}{{O}_{7}}\] dissolves in water to give permanganic acid which is purple in colour. \[M{{n}_{2}}{{O}_{7}}+{{H}_{2}}O\xrightarrow{{}}2HMn{{O}_{4}}\]


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