Kuiz Kimia Tingkatan 5 Bab 1 Set 3

SELAMAT DATANG Kuiz Kimia Tingkatan 5 Bab 1 Set 3

KUIZ INI MENGANDUNGI 10 SOALAN

In the electrolysis of a DILUTE aqueous solution of copper(II) chloride (CuCl2) using inert electrodes, what is produced at the anode?

Copper metal

Chlorine gas

Oxygen gas

Hydrogen gas

None

In the blast furnace, what is the main reducing agent that converts iron(III) oxide to molten iron?

Calcium carbonate (CaCO3)

Carbon monoxide (CO)

Carbon dioxide (CO2)

Silicon dioxide (SiO2)

None

Which of the following defines an oxidation reaction in terms of hydrogen transfer?

A substance loses hydrogen

A substance loses electrons

A substance gains oxygen.

A substance gains hydrogen.

None

What is the primary function of a salt bridge in a Daniell cell?

To allow ions to flow between the half-cells to maintain electrical neutrality.

To mix the two electrolyte solutions

To allow electrons to flow between the two half-cells

To act as the site of oxidation or reduction

None

Why is cryolite (Na3AlF6) added to aluminum oxide (Al2O3) during the industrial extraction of aluminum?

To lower the melting point of aluminum oxide.

To prevent the carbon anodes from oxidizing

To act as the main electrolyte for the process.

To increase the reactivity of aluminum

None

According to the principles of a chemical cell, which statement accurately describes the anode?

It is the negative terminal where oxidation occurs.

It is the positive terminal where reduction occurs.

It is the negative terminal where reduction occurs.

It is the positive terminal where oxidation occurs.

None

In the reaction Zn(p)+CuSO4(ak)→ZnSO4(ak)+ Cu(p), what is the role of the zinc metal, Zn?

It is the oxidizing agent.

It is the reducing agent.

It is a spectator ion.

It is the substance that is reduced

None

Which statement correctly compares a chemical cell and an electrolytic cell?

In both cells, the anode is the positive electrode

A chemical cell involves a spontaneous redox reaction, while an electrolytic cell involves a non-spontaneous one.

Both cells convert chemical energy to electrical energy.

In an electrolytic cell, oxidation occurs at the cathode.

None

If you want to electroplate a steel key with silver, which of the following setups is correct?

The key is the anode, a silver bar is the cathode, and the electrolyte is silver nitrate.

The key is the cathode, a silver bar is the anode, and the electrolyte is silver nitrate.

The key is the anode, a carbon rod is the cathode, and the electrolyte is silver nitrate.

The key is the cathode, a silver bar is the anode, and the electrolyte is sodium chloride.

None

10.

The process of purifying impure copper via electrolysis involves setting up a cell. How are the electrodes and electrolyte arranged?

Anode: Impure copper; Cathode: Pure copper; Electrolyte: NaCl(ak)

Anode: Impure copper; Cathode: Pure copper; Electrolyte: CuSO4(ak)

Anode: Pure copper; Cathode: Impure copper; Electrolyte: CuSO4(ak)

Anode: Carbon; Cathode: Impure copper; Electrolyte: CuSO4(ak)

None

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