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 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

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

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 a spectator ion.

It is the substance that is reduced

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 silver nitrate.

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 sodium chloride.

None

Which of these halogens is the strongest oxidizing agent?

Bromine (Br2)

Astatine (At2)

Iodine (I2)

Chlorine (Cl2)

None

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

Hydrogen gas

Oxygen gas

Copper metal

Chlorine gas

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 electrons to flow between the two half-cells

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

To mix the two electrolyte solutions

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

the same electropositivity as iron.

less electropositive (less reactive) than iron.

a very good electrical insulator

None

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

A substance gains hydrogen.

A substance loses hydrogen

A substance loses electrons

A substance gains oxygen.

None

10.

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

To prevent the carbon anodes from oxidizing

To act as the main electrolyte for the process.

To increase the reactivity of aluminum

To lower the melting point of aluminum oxide.

None

1 out of 10