NEET Sample Paper NEET Sample Test Paper-39

  • question_answer If Avogadro number \[{{N}_{A}},\]is changed from \[6.022\times {{10}^{23}}\,mo{{l}^{-1}}\]to \[6.022\,\times {{10}^{23}}\,mo{{l}^{-1}},\] this would change:

    A)  the ratio of chemical species to each other in a balanced equation

    B)  the ratio of elements to each other in a compound

    C)  the definition of mass in units of grams

    D)  the mass of one mole of grams

    Correct Answer: D

    Solution :

     \[\because \]mass of mol (\[6.022\times {{10}^{23\,}}\]atoms) of each = 12 g If Avogadro number \[({{N}_{A}})\]is changed, then mass of 1 mol (\[6.022\times {{10}^{20}}\]atom)of carbon \[=\frac{12\times 6.022\times {{10}^{20}}}{6.022\times {{10}^{23}}}=12\times {{10}^{-3}}g\] Therefore the mass of 1 mol of carbon is changed.

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