What reaction occurs at the cathode in the electrolyte method of extraction of aluminium? [1]
OR
Write whether the following statement is True or False: [1]
Free electrons carry electricity through electrolytic substances.
WBBSE
Class X
Physical Science
Metallurgy
01 Mark
2022
At the cathode in the electrolyte method of aluminium extraction, aluminium ions (Al³⁺) are reduced to form aluminium metal (Al). The reaction is:
Al3+ +3e− →Al
OR
False. Free ions, not free electrons, carry electricity through electrolytic substances.
Related Questions
More WBBSE Easy level questions
1/12
Q.
The metal which is extracted through thermal reduction is
A.
(c) Fe Explanation Iron (Fe) is extracted by thermal reduction (reduction of...
Q.
Which of the following is the formula of zine blende, an ore of zinc?
A.
b. ZnS Explanation: Zinc blende is the chief ore of zinc, and...
Q.
Which of the following elements is not present in Duralumin? (a) Al (b) Zn (c)...
A.
(b) Zn Explanation Duralumin is an alloy composed mainly of: Aluminium (Al)...
Q.
Name the metal which is extracted in thermite process.
A.
Iron (Fe) Explanation The thermite process is used to extract or weld...
Q.
Which of the following is an ore of Aluminium?
A.
(b) Bauxite Explanation Bauxite is the chief ore of aluminium. It mainly...
Q.
Match the right column with the left column: 2.11.1. Noble Gas (a) Cs2.11.2. Inver (b)...
A.
Left Column Right Column (1) Noble Gas (b) Rn (2) Inver (d)...
Q.
2.11.1. An alkaline earth metal (a) Fe 2.11.2. The metal which is present in the...
A.
2.11.1 → (c) Ca 2.11.2 → (a) Fe 2.11.3 → (d) K...
Q.
In the extraction of aluminium by the process of electrolysis, the fused mixture used contains...
A.
d. pure alumina. Explanation: In the extraction of aluminium through electrolysis, the...
Q.
Match the Right Column with the Left Column : 2.2.1 Metal present in German silver
A.
Left Column Correct Match 2.2.1 Metal present in German silver (d) Ni...
Q.
In the extraction of aluminium by electrolysis, what substances are present in the molten mixture...
A.
Besides pure alumina (Al₂O₃), the molten mixture contains: Cryolite (Na₃AlF₆) Fluorspar (CaF₂)...
Q.
Write two reasons why curd and sour fruits are not kept in copper and brass...
A.
Curd and sour fruits contain acids. Therefore, they should not be kept...
Q.
Untitled
A.
2.11.1 – (c) 2.11.2 – (d) 2.11.3 – (b) 2.11.4 – (a)