Kuiz Kimia Tingkatan 5 Bab 1 Set 3

SELAMAT DATANG Kuiz Kimia Tingkatan 5 Bab 1 Set 3

KUIZ INI MENGANDUNGI 10 SOALAN

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

A substance gains oxygen.

A substance loses electrons

A substance loses hydrogen

A substance gains hydrogen.

None

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

To mix the two electrolyte solutions

To allow electrons to flow between the two half-cells

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

To act as the site of oxidation or reduction

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 negative terminal where reduction occurs.

It is the positive terminal where oxidation occurs.

It is the positive terminal where reduction occurs.

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

Chlorine gas

Copper metal

Oxygen gas

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 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.

The key is the cathode, a silver bar is the anode, 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 a spectator ion.

It is the reducing agent.

It is the oxidizing agent.

It is the substance that is reduced

None

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

Carbon dioxide (CO2)

Calcium carbonate (CaCO3)

Carbon monoxide (CO)

Silicon dioxide (SiO2)

None

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

In an electrolytic cell, oxidation occurs at the cathode.

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

Both cells convert chemical energy to electrical energy.

None

Which of these halogens is the strongest oxidizing agent?

Iodine (I2)

Chlorine (Cl2)

Astatine (At2)

Bromine (Br2)

None

10.

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

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