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?

Oxygen gas

Chlorine gas

Copper metal

Hydrogen gas

None

Which of these halogens is the strongest oxidizing agent?

Iodine (I2)

Chlorine (Cl2)

Astatine (At2)

Bromine (Br2)

None

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

It is the substance that is reduced

It is the oxidizing agent.

It is a spectator ion.

It is the reducing agent.

None

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

A substance loses hydrogen

A substance gains hydrogen.

A substance loses electrons

A substance gains oxygen.

None

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

less electropositive (less reactive) than iron.

more electropositive (more reactive) than iron

the same electropositivity as iron.

a very good electrical insulator

None

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

To allow electrons to flow between the two half-cells

To mix the two electrolyte solutions

To act as the site of oxidation or reduction

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

None

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

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

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

None

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

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

To act as the main electrolyte for the process.

To increase the reactivity of aluminum

To prevent the carbon anodes from oxidizing

To lower the melting point of aluminum oxide.

None

10.

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

Carbon dioxide (CO2)

Calcium carbonate (CaCO3)

Silicon dioxide (SiO2)

Carbon monoxide (CO)

None

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