Advertisements
Advertisements
Question
Sulphide ores : Roasting : : Carbonate ores : _______
Advertisements
Solution
Sulphide ores : Roasting : : Carbonate ores : Calcination
APPEARS IN
RELATED QUESTIONS
Define the Ore.
Name the following:
The property possessed by metals by which they can be beaten into sheets.
M is a metal above hydrogen in the activity series and its oxide has the formula M2O. This oxide when dissolved in water forms the corresponding hydroxide which is a good conductor of electricity. In the above context, answer the following:
1) What kind of combination exists between M and O?
2)How many electrons are there in the outermost shell of M?
3) Name the group to which M belongs.
4) State the reaction taking place at the cathode.
5) Name the product at the anode.
In the extraction of aluminium: Draw the diagram for the extraction of aluminium.
Describe with one example, how moderately reactive metals (which are in the middle of reactivity series) are extracted.
Name the electrode at which aluminium metal is produced.
An element A which is a part of common salt and kept under kerosene reacts with another element B of atomic number 17 to give a product C. When an aqueous solution of product C is electrolysed then a compound D is formed and two gases are liberated.
- What are A and B?
- Identify C and D.
- What will be the action of C on litmus solution? Why?
- State whether element B is a solid, liquid or gas at room temperature.
- Write formula of the compound formed when element B reacts with an element E having atomic number 5.
Give reasons, why aluminum is used in:
In aluminiothermy
Name the ore of mercury. With the help of balanced chemical equations, explain the process of extraction of mercury from its ore.
Compare the process of calcination and roasting.
The following question relate to the extraction of aluminium by electrolysis.
Give the equation for the reaction which takes place at the cathode.
Calcium, copper, lead, aluminium, zinc, chromium, magnesium, iron.
Choose the major metals from the list given above to make the following alloys:
(a) Stainless steel
(b) brass
choose the most appropriate term to match the given description.
Heating of the ore in the absence of air to high temperature
State three objectives achieved during the roasting of ores.
Name the following :
The Process of heating an ore to a high temperature in the presence of air.
Explain concept with example/explain with the help of a balanced equation.
Roasting
The highly reactive metals like Sodium, Potassium, Magnesium, etc. are extracted by the ____________.
In thermite welding a mixture of ____________ is ignited with a burning magnesium ribbon which produces molten iron metal as a large amount of heat is evolved.
In extraction of copper, the flux used is ____________.
