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प्रश्न
In the electrolytic method, a layer of highly active metal is applied to a less active metal.
पर्याय
Right
Wrong
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उत्तर
In the electrolytic method, a layer of highly active metal is applied to a less active metal- Wrong
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संबंधित प्रश्न
Name the following:
Main ore of aluminium.
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.
Name the most abundant metal in the earth’s crust.
How is aluminium metal extracted? Explain with the help of an equation.
Manganese metal is extracted from manganese dioxide by a reduction process by making use of ______.
Give the principles of electromagnetic separation.
Name the anode, the cathode and the electrolyte used in the electrolytic refining of impure copper.
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.
Complete the incomplete statement with missing word:
Metals form positive ions while non- metals ______.
How many valence electrons are present in metals ?
Name the following:
A compound which is added to lower the fusion temperature of the electrolytic bath in the extraction of aluminium.
choose the most appropriate term to match the given description.
Heating of the ore in the absence of air to high temperature
Explain the concept of Roasting.
Explain the following reaction with the balanced equation.
Chlorine dissolved in water
Explain the following reaction with the balanced equation.
Sodium aluminate reacts with water
Explain concept with example/explain with the help of a balanced equation.
Calcination
The poorest conductor of heat among metals is ____________.
The process in which a carbonate ore is heated strongly in the absence of air to convert it into metal oxide is called ____________.
Which of the following ore is concentrated by the Froth floatation process?
