Q3 / 170 · Manipal (MET) 2020 · Chemistry

Certain electric current for half an hour can collect 11.2 L of hydrogen at NTP. Same current when passed through an electrolytic solution for one hour, can deposite how much silver?

  • Correct answer
    A
    216 g
  • B
    108 g
  • C
    47 g
  • D
    60 g

Solution

$11.2 \mathrm{~L}_2$ gas at NTP $=0.5$ mole of $\mathrm{H}_2$ gas $=1 \mathrm{~g}$ of $\mathrm{H}_2 \mathrm{~g}$ $\frac{w_1}{w_2}=\frac{E_1}{E_2}=\frac{1}{w_2}=\frac{1}{108}$ or $w_2=108 \mathrm{~g}$ silver is deposited in half an hour. Therefore, $108 \times 2=216 \mathrm{~g}$ silver will be deposited in one hour.

Hence, the correct answer is option: 'A'.

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