AP EAMCET · Chemistry · Electrochemistry
Same quantity of electricity was passed through solutions of sales of elements \(X, Y\) and \(Z\) with atomic masses 7,27 and 48 respectively. The mass of \(X, Y\) and \(Z\) deposited were \(2.1 \mathrm{~g}, 2.7 \mathrm{~g}\) and \(7.2 \mathrm{~g}\) respectively. The valence's of \(X, Y\) and \(Z\) respectively are
- A 3,2 and 1
- B 1,2 and 3
- C 1,3 and 2
- D 2,3 and 1
Answer & Solution
Correct Answer
(C) 1,3 and 2
Step-by-step Solution
Detailed explanation
According to Faraday's law \[ \begin{array}{rlr} W & =Z Q & {[W=\text { weight of substance }]} \\ & =\frac{E Q}{96500} \quad[E=\text { Equivalent weight }] \end{array} \] For \(X\) \[ 2.1=\frac{(7 / x) Q}{96500} \] For \(Y\) \[ 2.7=\frac{(27 / y) Q}{96500} \] For \(Z\)…
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