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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
How is copper extracted from its sulphide ore? Explain the various steps supported by chemical equations. Draw labelled diagram for the electrolytic refining of copper.
Define the term ore.
Explain giving equation, what happens when:
ZnCO3 is heated in the absence of air?
Which metal is extracted from cinnabar ore?
Explain how, mercury is extracted from its sulphide ore (cinnabar). Give equations of the reactions involved.
The major ore of aluminium is known as ______.
Which metal can be extracted from the following ore?
bauxite
Which method of refining is used to get 99.8% pure aluminium?
How many valence electrons are present in non- metals?
Complete the following by selecting the correct option from the choices given:
The metal which does not react with water or dilute H2SO4 but reacts with concentrated H2SO4 is _________
Find the odd one out and give its explanation.
Gold and silver are active metals.
Write the molecular formulae of the following compound.
Sodium aluminate
Explain Bayer’s process.
Explain the following reaction with the balanced equation.
Ferric oxide is reacted with aluminium.
Explain in brief types of extraction of highly reactive metals according to their reactivity.
The poorest conductor of heat among metals is ____________.
Oxides of moderately reactive metals like Zinc, Iron, Nickel, Tin, Copper, etc. are reduced by using:
In extraction of copper, the flux used 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.
