Railways General Science & Technology Biology in Human Welfare Sample Paper Biology in Human Welfare Sample Test Paper-34

  • question_answer
    Which gas is responsible for the puffed-up appearance of dough?

    A)  \[C{{O}_{2}}\]

    B)  \[{{O}_{2}}\]

    C)  \[S{{O}_{2}}\]

    D)  \[N{{O}_{2}}\]

    Correct Answer: A


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