Two electrolytic cells containing CuS O_4 and AgN O_3 respectivel… - Vidyadip

MCQ

Two electrolytic cells containing $CuS{O_4}$ and $AgN{O_3}$ respectively are connected in series and a current is passed through them until $1 \,mg$ of copper is deposited in the first cell. The amount of silver deposited in the second cell during this time is approximately ......... $\mathrm{mg}$ [Atomic weights of copper and silver are respectively $63.57$ and $107.88$]

A
$1.7$
✓
$3.4 $
C
$5.1$
D
$6.8$

✓

Answer

Correct option: B.

$3.4 $

b
(b) $\frac{{{m_1}}}{{{m_2}}} = \frac{{{E_1}}}{{{E_2}}}$ (By faraday law for same current and time)

Where $E_1$ and $E_2$ are the chemical equivalents and $m_1$ and $m_2$ are the masses of copper and silver respectively.

$E = \frac{{{\rm{Atomic\,weight}}}}{{{\rm{Valency}}}}$.

${E_1} = \frac{{63.57}}{2} = 31.79$ and ${E_2} = \frac{{107.88}}{1} = 107.88$
$\frac{{1\,mg}}{{{m_2}}} = \frac{{31.79}}{{107.88}}$

$\Rightarrow $ ${m_2} = \frac{{107.88}}{{31.79}}\,mg = 3.4\,mg$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

NEET STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

The heat of transition $(\Delta {H_t})$ of graphite into diamond would be, where$C({\rm{graphite}}) + {O_2}(g) \to C{O_2}(g);\,\,\Delta H = x\,kJ$ $C({\rm{diamond}})\, + {O_2}(g) \to C{O_2}(g);\,\,\Delta H = y\,kJ$

A $124\ W$ bulb converts only $15\ \%$ of the energy supplied to it into visible light of wavelength $640\ nm$ . How many photons are emitted by the light bulb in one second

Which one of the following mixtures can be separated into pure components by fractional distillation

The $pH$ of $0.1\,\, M$ solution of the following salts increases in the order

At $25\,^oC\,,\, K_{sp}$ for $PbBr_2$ is equal to $8 \times 10^{-5}$ . If the salt is $80\%$ dissociated, what is the solubility of $PbBr_2$ in $mol/litre$ ?

The addition of tetraethyl lead to petrol

Which of the following is the most suitable drying agent for ammonia gas

Identify the reaction from following having top position in $EMF$ series (Std. red. potential) according to their electrode potential at $298 \;K$.

Cairo's acid have how many $S-OH$ bond

In which of the following combination, is buffer action expected ?
$(a)\, NH_4OH + NH_4Cl$
$(b)\, HCl + NaCl$
$(c)\, NH_4OH + HCl$ in $2 : 1$ mole ratio
Select the correct answer using the code given below