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

a very good electrical insulator

more electropositive (more reactive) than iron

the same electropositivity as iron.

less electropositive (less reactive) than iron.

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.

In an electrolytic cell, oxidation occurs at the cathode.

Both cells convert chemical energy to electrical energy.

None

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

To lower the melting point of aluminum oxide.

To act as the main electrolyte for the process.

To prevent the carbon anodes from oxidizing

To increase the reactivity of aluminum

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 a spectator ion.

It is the reducing agent.

It is the oxidizing agent.

None

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

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

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)

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 act as the site of oxidation or reduction

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

None

Which of these halogens is the strongest oxidizing agent?

Astatine (At2)

Iodine (I2)

Bromine (Br2)

Chlorine (Cl2)

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

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

A substance loses electrons

A substance gains oxygen.

A substance gains hydrogen.

A substance loses hydrogen

None

10.

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 positive terminal where oxidation occurs.

It is the negative terminal where reduction occurs.

It is the positive terminal where reduction occurs.

None

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