Electrolytic Refining

Q.

The ease of adsorption of the hydrated alkali metal ions on an ion exchange resins follows the order?

1. 
   $\mathrm{R}{\mathrm{b}}^{+}<{\mathrm{K}}^{+}<\mathrm{N}{\mathrm{a}}^{+}<\mathrm{L}{\mathrm{i}}^{+}$

2. 
   ${\mathrm{K}}^{+}<\mathrm{N}{\mathrm{a}}^{+}<\mathrm{R}{\mathrm{b}}^{+}<\mathrm{L}{\mathrm{i}}^{+}$

3. 
   $\mathrm{N}{\mathrm{a}}^{+}<\mathrm{L}{\mathrm{i}}^{+}<{\mathrm{K}}^{+}<\mathrm{R}{\mathrm{b}}^{+}$

4. 
   $\mathrm{L}{\mathrm{i}}^{+}<{\mathrm{K}}^{+}<\mathrm{N}{\mathrm{a}}^{+}<\mathrm{R}{\mathrm{b}}^{+}$

Q.

What is electrolytic reduction? Explain with the help of an example.

Q.

What is the difference between ferric and ferrous?

Q. You want to study a decomposition reaction by taking ferrous sulphate crystals in a boiling tube.List two precautions you would follow while doing the experiment.

Q.

We cannot store \(CuSO_4\) solution in an iron vessel. Why?

1. Copper is more electropositive than iron.

2. Copper is above iron in the electrochemical series.

3. Iron is above copper in the electrochemical series.

4. Copper is not in the electrochemical series.

Q.

What is anode mud? And what are its uses?

Q.

During the electrolytic refining of copper, pure copper is deposited at the anode.

1. False

2. True

Q.

During the refining of an impure metal by electrolysis, the pure metal is a deposited:
(a) at the cathode (b) On the walls of the electrolytic tank
(c) at the anode (d) at the bottom of the electrolytic tank

Q. During electrolytic refining of silver metal which electrolyte must be used?

Q. Explain blast furnace.

Q.

In electrolytic refining, the impure metal is made as:

1. Electrolyte

2. Cathode

3. Anode

4. Both cathode and anode

Q.

What is anode mud?

Q.

In a simple electrochemical cell it says that zinc rod dipped in zinc sulphate solution gives zinc+ ion and electrons. How is that zinc reacts with its own salt to give electrons is my question.plz explain. Thanks.

Q.

What chemical process is used for obtaining a metal from its oxide?

Q. Why only non-metals act as an oxidising agent?

Q. During the process of electrolytic refining, the pure metal is deposited at the ________.

1. anode
2. bottom of the anode
3. initially at cathode and then at anode
4. cathode

Q.

During the electrolytic refining of copper, the impurities which settled down at the bottom of the anode in the form of sludge are called as __.

Q.

What is the meaning of refining?

Q. Zinc is more reactive than aluminium.

1. True
2. False

Q.

What does Copper and Chlorine make?

Q. Differentiate between electrolytic refining and electrolytic reduction

Q.

In general, electrolytic refining is a process of purification of impure metal during which an electric current is passed through an electrolytic cell which contains impure metal as anode, a suitable electrolyte and pure metal as cathode.

1. True

2. False

Q.

Electrolysis involves oxidation and reduction respectively at:

1. Anode, Cathode

2. Cathode, Anode

3. Anode, Anode

4. Cathode, Cathode

Q.

How does reactivity change as move along a period or fowd a group. Does it depend on whether the element is metal or a non metal?

Q.

In electrorefining of copper, impure copper is made anode.

1. True

2. False

Q. A metal article is to be electroplated with silver. The electrolyte selected is sodium argentocyanide.
(a) What kind of salt is sodium argentocyanide?
(b) Why is it preferred to silver nitrate as an electrolyte?
(c) State one condition to ensure that the deposit is smooth, firm and long lasting.
(d) Write the reaction taking place at the cathode.
(e) Write the reaction taking place at the anode.

Q.

In the refining of silver, the recovery of silver from silver nitrate solution displacement by copper metal . Write down the chemical equation of the reaction involved.

Q.

In a fuel cell, H2& O2 react to produce electricity. In the process, H2 gas is oxidized at the anode & O2 at the cathode . If 67.2 litre of H2 at STP react in 15 minutes, If the entire current is used for electrode deposition of Cu from Cu (II) solution, how many grams of Cu will be deposited?

1. 190.5 g

2. 160 g

3. 280 g

4. 320 g

Q.

One of the most common applications of chemical effect of electric current is ______________.

Q.

How are metals refined by the electrolytic process? Describe the electrolytic refining of copper with the help of a neat labelled diagram.