Kuiz Kimia Tingkatan 5 Bab 1 Set 3

SELAMAT DATANG Kuiz Kimia Tingkatan 5 Bab 1 Set 3

KUIZ INI MENGANDUNGI 10 SOALAN

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

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

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

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

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

None

In the context of rusting, sacrificial protection involves connecting iron to another metal. For this to work, the other metal must be:

more electropositive (more reactive) than iron

a very good electrical insulator

the same electropositivity as iron.

less electropositive (less reactive) than iron.

None

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

Oxygen gas

Hydrogen gas

Chlorine gas

Copper metal

None

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

It is the positive terminal where oxidation occurs.

It is the positive terminal where reduction occurs.

It is the negative terminal where reduction occurs.

It is the negative terminal where oxidation occurs.

None

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

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.

In both cells, the anode is the positive electrode

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

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

None

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

It is the reducing agent.

It is a spectator ion.

It is the oxidizing agent.

It is the substance that is reduced

None

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

To prevent the carbon anodes from oxidizing

To increase the reactivity of aluminum

To act as the main electrolyte for the process.

To lower the melting point of aluminum oxide.

None

What is the correct IUPAC name for the compound Cu2O?

Dicopper monoxide

Copper oxide

Copper(I) oxide

Copper(II) oxide

None

10.

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

To act as the site of oxidation or reduction

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

To allow electrons to flow between the two half-cells

To mix the two electrolyte solutions

None

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