10th Class Science Solved Paper - Science-2016 Outside Delhi Set-I

  • question_answer             A student adds a spoon full of powdered sodium hydrogen carbonate to a flask containing ethanoic acid. List two main observations, he must note in his note book, about the reaction that takes place. Also write chemical equation for the reaction.


    The two main observations are:
    (i) Brisk effervescence.
    (ii) Evolution of colourless and odourless gas
                \[C{{H}_{3}}COOH+NaHC{{O}_{3}}\to C{{H}_{3}}COONa+{{H}_{2}}O+C{{O}_{2}}\]


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