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प्रश्न
Sulphide ores : Roasting : : Carbonate ores : _______
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उत्तर
Sulphide ores : Roasting : : Carbonate ores : Calcination
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संबंधित प्रश्न
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.
Why does a new aluminium vessel lose shine so soon after use?
Explain why, carbon cannot reduce oxides of sodium or magnesium.
Why does aluminium not corrode right through?
Give the name of one ore of iron. Which iron compound is present in this ore? Write its chemical formula.
How is copper extracted from its sulphide ore (copper glance), Cu2S? Explain with equations of the reactions involved.
The two metals which can be extracted just by heating their sulphides in air are:
(a) sodium and copper
(b) copper and aluminium
(c) potassium and zinc
(d) mercury and copper
A sulphide ore is converted into metal oxide by the process of:
(a) carbonation
(b) roasting
(c) calcination
(d) anodising
Aluminum is used in thermite welding:
what is ignition mixture?
Complete the incomplete statement with missing word:
Metals are malleable while non-metals are ______.
Which one of the following is not true of metal :
Metals form non-polar covalent compounds
Which one of the following is not true of metal :
Metal will have 1 or 2 or 3 electrons in their valence shell.
Draw a well-labelled diagram of extraction of Aluminium. Write the anode reaction in electrolytic reduction of Alumina.
Observe the given figure of reactivity series of metals and answer the following questions:
Reactivity series of metals
- Name two metals which react with water.
- Name two moderately reactive metals.
- Name the most highly reactive metal and the most less reactive metal.
Identify who I am!
Ore of Aluminum- ______
Write the molecular formulae of the following compound.
Fluorspar
Write the molecular formulae of the following compound.
Sodium aluminate
Observe the following diagram and write answers.
- Name the method.
- Write anode reaction and cathode reaction.
- Why fluorspar and cryolite are added in the mixture?
The poorest conductor of heat among metals is ____________.
Assertion (A): The extraction of metals from their sulphide ores cannot take place without roasting the ore.
Reason (R): Roasting converts sulphide ores directly into metals.
