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

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

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

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

None

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

In an electrolytic cell, oxidation occurs at the cathode.

Both cells convert chemical energy to electrical energy.

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

In both cells, the anode is the positive electrode

None

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

Copper metal

Hydrogen gas

Oxygen gas

Chlorine gas

None

Which of these halogens is the strongest oxidizing agent?

Chlorine (Cl2)

Bromine (Br2)

Astatine (At2)

Iodine (I2)

None

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 mix the two electrolyte solutions

To allow electrons to flow between the two half-cells

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 the oxidizing agent.

It is the substance that is reduced

It is a spectator ion.

None

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

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.

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

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

None

What is the correct IUPAC name for the compound Cu2O?

Copper(II) oxide

Dicopper monoxide

Copper oxide

Copper(I) oxide

None

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

To prevent the carbon anodes from oxidizing

To lower the melting point of aluminum oxide.

To act as the main electrolyte for the process.

To increase the reactivity of aluminum

None

10.

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

Silicon dioxide (SiO2)

Carbon monoxide (CO)

Calcium carbonate (CaCO3)

Carbon dioxide (CO2)

None

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