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NEET Sample Paper NEET Sample Test Paper-54

  • question_answer
    4.5 g of aluminium (at. mass 27 amu) is deposited at cathode from \[A{{l}^{3+}}\] Solution by a certain quantity of electric charge. The volume of hydrogen produced at STP from \[{{H}^{+}}\] ions in solution by the same quantity of electric charge will be-

    A) 44.8 L              

    B) 11.2 L

    C) 22.4 L              

    D) 5.6 L

    Correct Answer: D

    Solution :

    \[\frac{{{W}_{1}}}{{{E}_{1}}}=\frac{{{W}_{2}}}{{{E}_{2}}}\] \[\frac{4.5}{9}\,\,=\,\,\frac{{{W}_{2}}}{1}\] \[{{W}_{2}}\,\,=\,\,0.5\text{ }g~~~\,\,\,\,\therefore \,\,\text{ }moles\,\,=\,\,\frac{0.5}{2}\] \[and\text{ }vol.=\frac{0.5}{2}\,\,\times \,\,22.4\,\,\,=\,\,\,5.6\,\,l\]


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