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

  • question_answer 34)             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.

    Answer:

    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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