Extraction of Non-metals from Ores
Chemistry ⇒ Metals and Non-metals
Extraction of Non-metals from Ores starts at 10 and continues till grade 12.
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Describe the Frasch process for the extraction of sulphur.
Describe the main steps in the extraction of chlorine from brine.
Describe the process of extracting iodine from seaweed.
Describe the role of coke in the extraction of phosphorus from phosphate rock.
Describe the steps involved in the extraction of phosphorus from phosphate rock.
Explain why electrolysis is not commonly used for the extraction of non-metals.
Explain why non-metals are usually found in nature in the combined state.
Explain why non-metals like nitrogen and oxygen are obtained from air rather than from ores.
Which non-metal is commonly obtained from the mineral apatite? (1) Sulphur (2) Phosphorus (3) Nitrogen (4) Carbon
Which non-metal is extracted from sodium chloride by electrolysis? (1) Sulphur (2) Chlorine (3) Phosphorus (4) Nitrogen
Which of the following is a method used to extract sulphur from underground deposits? (1) Frasch process (2) Electrolysis (3) Roasting (4) Distillation
Which of the following is a non-metallic element that can be extracted from sea water? (1) Sulphur (2) Iodine (3) Phosphorus (4) Carbon
Fill in the blank: The extraction of non-metals from their ores often involves the process of ________ to remove impurities.
Fill in the blank: The main source of chlorine is ________.
Fill in the blank: The main source of iodine is the ________ of seaweeds.
Fill in the blank: The main source of phosphorus is the mineral ________.
State whether the following statement is true or false: Sulphur can be extracted by heating its ore in air.
State whether the following statement is true or false: The extraction of non-metals from their ores is always a physical process.
State whether the following statement is true or false: The extraction of non-metals from their ores is always carried out in the presence of air.
State whether the following statement is true or false: The extraction of non-metals from their ores may involve the use of reducing agents.
