Question 7 1 out of 1 points Oxygen can be prepared by suitable electrolysis of

Question

Question 7

1 out of 1 points

Oxygen can be prepared by suitable electrolysis of aqueous oxide salts

Selected Answer:

2.

True

Correct Answer:

2.

True

Question 8

1 out of 1 points

Chromium metal can be prepared by electrolysis of its aqueous salts

Selected Answer:

1.

True

Correct Answer:

1.

True

Question 9

1 out of 1 points

What product(s) forms at the anode in the electrolysis of an aqueous solution of Na3PO4?

Selected Answer:

1.

O2 and H+

Correct Answer:

1.

O2 and H+

Can anybody explain step by step how to understand or solve these (conceptual?) questions?

Thanks

Oxygen can be prepared by suitable electrolysis of aqueous oxide salts

Selected Answer:

2.

True

Correct Answer:

2.

True

Explanation / Answer

1) The given answer is true as the compound is in aqueous solution. In aq solutions, water can be oxidized at the anode to produce O2.

2) True: because at cathode chromium ion is reduced to chromium metal.

3) At anode H2O is oxidized to O2 . Similarly at cathode H2O is reduced to H2.

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