Which of the following is the formula of zine blende, an ore of zinc?
- ZnO
- Zns
- ZnCO3
- InSO4
WBBSE
Class X
Physical Science
Metallurgy
01 Mark
2023
b. ZnS
Explanation:
- Zinc blende is the chief ore of zinc, and its chemical formula is ZnS.
- Other important ores are ZnCO₃ (Calamine) and ZnO (Zincite), but ZnS = Zinc blende.
Related Questions
More WBBSE Easy level questions
1/12
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.
The metal which is extracted through thermal reduction is
A.
(c) Fe Explanation Iron (Fe) is extracted by thermal reduction (reduction of...
Q.
What reaction occurs at the cathode in the electrolyte method of extraction of aluminium?
A.
At the cathode in the electrolyte method of aluminium extraction, aluminium ions...
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.
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 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.
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.
In the extraction of metal by the process of electrolysis at which electrode does the...
A.
The reaction occurs at the cathode during the process of electrolysis. This...
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...