Electrolysis of aqueous solutions of which of the following substances results in only the decomposition of water ?A. Potassium chlorideB. Zinc sulphateC. Potassium hydroxideD. Sodium phosphate

Electrolysis of aqueous solutions of which of the following substances

1.	Electrolysis of aqueous solutions of which of the following substances results in only the decomposition of water ?A. Potassium chlorideB. Zinc sulphateC. Potassium hydroxideD. Sodium phosphate
Answer» Correct Answer - c,d Electrolysis of `ZnSO_(4)` is done for the purification of `Zn` using `Al` cathode on which it gets reduced `(` factual statement `).`

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Based on the data given below, the correcy order of reducing power is: `Fe_((aq.))^(3+) + e rarr Fe_((aq.))^(2+), E^(@) = +0.77 V` `Al_((aq.))^(3+) + 3e rarr Al_((s)), E^(@) = -1.66 V` `Br_(2(aq.)) + 2e rarr 2Br_((aq.))^(-), E^(@) = +1.08 V`A. `Br^(-) lt Fe^(2+) lt Al`B. `Fe^(2+) lt Al lt Br^(-)`C. `Al lt Br^(-) lt Fe^(2+)`D. `Al lt Fe^(2+) lt Br^(-)`
Based on the data given below, the correcy order of reducing power is: `Fe_((aq.))^(3+) + e rarr Fe_((aq.))^(2+), E^(@) = +0.77 V` `Al_((aq.))^(3+) + 3e rarr Al_((s)), E^(@) = -1.66 V` `Br_(2(aq.)) + 2e rarr 2Br_((aq.))^(-), E^(@) = +1.08 V`A. `Br^(-) lt Fe^(2+) lt Al`B. `Fe^(2+) lt Al lt Br^-`C. `Al lt Br^(-) lt Fe^(2+)`D. `Al lt Fe^(2+) lt Br^(-)`
What are elementary reactions ?

Electrolysis of aqueous solutions of which of the following substances results in only the decomposition of water ?A. Potassium chlorideB. Zinc sulphateC. Potassium hydroxideD. Sodium phosphate

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