Railways R.R.C. (Kolkata) Solved Paper Held on 2nd Shift 9-11-2014

  • question_answer
    Soda water contains?

    A) sodium bicarbonate        

    B) sodium carbonate

    C) carbonic acid                 

    D) sodium hydroxide

    Correct Answer: C

    Solution :

    Soda water bottle contains carbon dioxide, which is dissolved in water?   \[C{{O}_{2}}+{{H}_{2}}O\to {{H}_{2}}C{{O}_{3}}\](carbonic acid)


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