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NEET 2005
Exam
NEET
Year
2005
Subject
Chemistry
Chapter
Some Basic Concepts of Chemistry

NEET 2005 · Chemistry · Some Basic Concepts of Chemistry

4.5 ~g of aluminium (at mass 27 amu ) is deposited at cathode from...

4.5 g4.5 \mathrm{~g} of aluminium (at mass 27amu27 \mathrm{amu} ) is deposited at cathode from Al3+\mathrm{Al}^{3+} solution by a certain quality of electric charge. The volume of hydrogen produced at STP from H+\mathrm{H}^{+}ions in solution by the same quantity of electric charge will be:

Options

  1. A44.8 L44.8 \mathrm{~L}
  2. B22.4 L22.4 \mathrm{~L}
  3. C11.2 L11.2 \mathrm{~L}
  4. D5.6 L5.6 \mathrm{~L}

Correct answer

D. 5.6 L5.6 \mathrm{~L}

Step-by-step solution

We know that, I Faraday charge liberates 1 eq. of substance. eq. wt. of AI= wt.of Al eq. wt=4.59=0.5\mathrm{AI}=\frac{\text{ wt.of } \mathrm{Al}}{\text{ eq. } w t}=\frac{4.5}{9}=0.5 no. of Faraday required =0.5=0.5 no. of eq. of H2\mathrm{H}_2 produce =0.5=0.5 eq. Volume occupied by 1 eq. of H2=22.42=11.2\mathrm{H}_2= \frac{22.4}{2}=11.2 Volume occupied by 0.5eq=11.2×0.50.5 \mathrm{eq}=11.2 \times 0.5=5.6litreatSTPlitre at STP
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