What happens when molten NaCI is electrolysed in electrolytic cell?

Chlorine is produced at positive electrode

Sodium ions lose electrons at negative electrode

Electrons flow through liquid from -ve electrode to +ve electrode

Oxidation occurs at -ve electrode and reduction at +ve electrode

Which statement correctly describes the 2 electrodes?

The anode is positive and the cathode is negative

The anode is negative and the cathode is positive

The anode and cathode are both positive

The anode and cathode are both negative.

What does the Cathode (-) do to ions?

Give electrons to the Positive ions to turn them back into atoms

Take electrons from the positive ions?

Turn ions back into atoms by removing electrons

Turn atoms into ions by adding electrons

Which statement correctly describes the 2 electrodes?

The anode is positive and the cathode is negative

The anode is negative and the cathode is positive

The anode and cathode are both positive

The anode and cathode are both negative.

What happens at the positive electrode?

Negative non-metal ions are attracted

Positive non-metal ions are attracted

Positive metal ions are attracted

Negative metal ions are attracted

A student decided to silver-plate a locker key using the apparatus shown. In this cell, the key is the

cathode and is connected to the negative terminal of the power supply

anode and is connected to the positive terminal of the power supply

anode and is connected to the negative terminal of the power supply

cathode and is connected to the positive terminal of the power supply

In the electrolytic production of aluminium metal from alumina (Al 2 O 3 ), the alumina is dissolved in cryolite (Na 3 AlF 6 ). The anodes and cathodes are made of carbon. The electrode reactions may be represented by C + 2O 2- → CO 2 + 4e - Al 3+ + 3e - → Al The net reaction for this electrolysis process is

4Al 3+ +6O 2- +O 2 +C→2Al 2 O 3 +CO 2

96.5 C of electricity is used to completely deposit silver metal (Ag) from an aqueous solution in which the silver ion is present as Ag + (aq). Another 96.5 C is used to completely deposit copper (Cu) from an aqueous solution in which the copper ion is present as Cu 2+ (aq). The silver metal deposited would

be twice the mole of the copper deposited

have half the mass of the copper deposited

have twice the mass of the copper deposited

be half the mole of the copper deposited

Which one of the following statements is true for both galvanic cells and electrolytic cells?

Reduction occurs at the cathode in both cells.

Reduction occurs at the negative electrode in both cells.

Anions migrate to the cathode in both cells.

The anode is positive in both cells.

The rechargeable nickel-cadmium is used to power small electrical devices. When the cell is producing electrical energy, the half-reactions at the electrodes are: Electrode I: Cd(s)→Cd 2+ (aq) + 2e - Electrode II: NiO(OH)(s) + H 2 O(l) + e - → Ni(OH) 2 (s) + OH - (aq) Which of the following shows the correct electrode polarity and half-cell reaction of the anode when the cell is being recharged?

Positive, Ni(OH) 2 (s)+OH - (aq)→NiO(OH)(s)+H 2 O(l)+e -

Positive, Cd 2+ (aq)+2e - →Cd(s)

Negative, Ni(OH) 2 (s)+OH - (aq)→NiO(OH)(s)+H 2 O(l)+e -

Negative, Cd 2+ (aq)+2e - →Cd(s)

Gas A - hydrogen Gas B - Oxygen

Gas A - Oxygen Gas B - Hydrogen

An experiment is set up as shown in the diagram below. Both electrodes P and Q are made of graphite. Which of the following gives the correct results as electrolysis proceeds?

Electrolytes: Aqueous copper(II) sulfate; Mass of P: Increase; Mass of Q: Remains unchanged

Electrolytes: Aqueous sodium chloride; Mass of P: Remains unchanged; Mass of Q: Increase

Electrolytes: Aqueous sodium chloride; Mass of P: Increase; Mass of Q: Remains unchanged

Electrolytes: Aqueous copper(II) sulfate; Mass of P: Remains unchanged; Mass of Q: Increase

Dilute aqueous zinc chloride is electrolysed using platinum electrodes. What are the products at the electrodes?

anode: oxygen cathode: hydrogen

anode: chlorine cathode: hydrogen

anode: hydrogen cathode: oxygen

Electrolytic cells

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Chemistry

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The anode is where oxidation occurs in...

A Galvanic Cell

A Electrolytic Cell

Both Galvanic and Electrolytic cells

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In electrolytic cell which its electrolyte is copper (II) sulphate, copper are used as electrodes. What is the product at the anode?

Oxygen gas and water

Copper metal

Copper (II) ions

Hydrogen gas

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In an electrolytic cell, the positive electrode is the

anode, where oxidation occurs

anode where reduction occurs

cathode where oxidation occurs

cathode where reduction occurs

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is an electrolytic cell?

a cell that converts chemical energy into electrical energy

a cell that converts electrical energy into electrical energy

a cell that converts electrical energy into chemical energy

A cell that converts kinetic energy into potential energy.

Which factors affect amount of metal formed during electrolysis?

I and II

I and III

II and III

I, II and III

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What occurs during electrolysis of a molten salt?

Electricity is produced by a spontaneous redox reaction

Electricity cause a non-spontaneous redox reaction to occur

Electrons flow through the molten salt

Electrons are removed from both ions of the molten salt

Object is electroplated with copper using copper(II) sulfate. Which statement is correct?

Positive electrode increases in mass

Concentration of Cu²⁺ ions in solution decreases

Reduction occurs at positive electrode

Reaction at negative electrode is Cu²⁺ + 2e^– → Cu

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Electrolytic cells

The anode is where oxidation occurs in...

In electrolytic cell which its electrolyte is copper (II) sulphate, copper are used as electrodes. What is the product at the anode?

In an electrolytic cell, the positive electrode is the

What is an electrolytic cell?

Which factors affect amount of metal formed during electrolysis?

What occurs during electrolysis of a molten salt?

Object is electroplated with copper using copper(II) sulfate. Which statement is correct?

Which are used for electroplating of a metal spoon with copper?

What happens when molten NaCI is electrolysed in electrolytic cell?

Which statement correctly describes the 2 electrodes?

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