7th Class Science Sample Paper Science Olympiad Model Test Paper-19

  • question_answer
    Fill in the blanks with correct combination of words. When\[\underline{\,\,\,\,L\,\,\,\,}\]and \[\underline{\,\,\,\,M\,\,\,\,}\]are mixed together, a chemical reaction takes place which causes formation of three new substances; \[\underline{\,\,\,\,N\,\,\,\,}\], \[\underline{\,\,\,\,O\,\,\,\,}\] and \[\underline{\,\,\,\,P\,\,\,\,}\].

    A) L - lime water, M - Baking soda, N - Sodium acetate, O - Carbon dioxide, P - water

    B) L - Lime water, M - Vinegar, N - Calcium acetate, O - Carbon dioxide, P - water

    C) L - Baking   soda,   M - Vinegar,   N - Sodium hydroxide, O - Carbon dioxide, P - water

    D) L - Baking soda, M - Vinegar, N - Sodium acetate, O - Carbon dioxide, P - water

    E) None of these

    Correct Answer: D


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