Test on Electrolysis and Potometer Experiments

Question 1: At the cathode, an electrolysis experiment will always produce a pure metal coating the electrode.

A. Ano

B. Ne

Explanation: At the cathode, the products of electrolysis can be either a pure metal coating the electrode or bubbles of hydrogen gas, not exclusively a pure metal.

Question 2: During electrolysis, a pure metal coating the electrode can be a product at the cathode.

A. Ano

B. Ne

Explanation: The study materials state that "At the cathode you’ll either get a pure metal coating the electrode or bubbles of hydrogen gas." This confirms that a pure metal coating the electrode is a possible product at the cathode.

Question 3: According to the study materials, what product is formed at the anode during electrolysis if a halide ion is present?

A. Bubbles of oxygen gas

B. Bubbles of hydrogen gas

C. A pure metal coating the electrode

D. The halogen corresponding to the halide ion

Explanation: The study materials state: 'At the anode, you’ll get bubbles of oxygen gas unless a halide ion is present, when you’ll get the halogen.' This indicates that if a halide ion is present, the halogen is formed instead of oxygen gas.

Question 4: Under what specific condition will oxygen gas NOT be produced at the anode during electrolysis, according to the provided study materials?

A. When the solution is highly concentrated

B. When a halide ion is present

C. When the H⁺ ions are more reactive than other positive ions

D. When a pure metal is coating the cathode

Explanation: The study materials state: 'At the anode, you’ll get bubbles of oxygen gas unless a halide ion is present, when you’ll get the halogen.' This indicates that oxygen gas will not be produced if a halide ion is present.

Question 5: Time should be allowed for the shoot to acclimatise during the potometer setup process.

A. Ano

B. Ne

Explanation: The study materials explicitly state in step 5, 'allow time for the shoot to acclimatise' as part of the potometer setup.