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10th Class Science Sample Paper Science Olympiad Model Test Paper-12

  • question_answer
    Which one of the following changes takes place during the chemical reaction given below? \[N{{a}_{2}}S{{O}_{4}}+BaC{{l}_{2}}\to BaS{{O}_{4}}+2NaCl\]

    A) Colour changes from black to colourless.

    B) It evolves heat

    C) A white precipitate is formed

    D) No change takes places

    E) None of these

    Correct Answer: C

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