Electrochemistry - Result Question 53

####2. A solution of $Ni\left(NO _3\right) _2$ is electrolysed between platinum electrodes using 0.1 Faraday electricity. How many mole of $Ni$ will be deposited at the cathode? (2019 Main, 9 April II)

(a) 0.20

(b) 0.10

(c) 0.15

(d) 0.05

Show Answer

Answer:

Correct Answer: 2. (b)

Solution:

  1. A solution of $Ni\left(NO _3\right) _2$ is electrolysed between platinum electrodes using 0.1 Faraday electricity. It means that 0.1 equivalent of $Ni^{2+}$ will be discharged.

Electrolysis of $Ni\left(NO _3\right) _2$ gives

$$ Ni^{2+}+2 e^{-} \longrightarrow Ni \quad(\text { Atomic mass of } Ni=58.7) $$

Number of equivalents $=$ Number of moles $\times$ number of electrons. $0.1=$ Number of moles $\times 2$

$\therefore$ Number of moles of $Ni=\frac{0.1}{2}=0.05$



जेईई के लिए मॉक टेस्ट

एनसीईआरटी अध्याय वीडियो समाधान

दोहरा फलक