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प्रश्न
Give appropriate scientific reasons for Electrolysis is of molten lead bromide is considered to be a redox reaction.
उत्तर
In the electrolysis of molten lead bromide, the following reactions take place:
At the cathode: Pb2+ (l) + 2e- → Pb(l)
At the anode: 2Br- (l) → Br2 (g) + 2e-
Lead (II) ions (Pb2+) are attracted to the negative electrode, and the Pb2+ ions are forced to accept two electrons. Pb2+ ions are reduced. Bromide ions (Br-) are attracted to the positive electrode and the bromide ions are forced to give away their extra electron to form bromine atoms. Thus, bromide ions are oxidized. So, electrolysis of molten lead bromide is a redox reaction.
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संबंधित प्रश्न
Explain why it is preferable to use a number of graphite electrodes as the anode instead of a single electrode, during the above electrolysis.
Give reason for the following:
Lead bromide undergoes electrolytic dissociation in the molten state but is a non-electrolyte in the solid state.
Complete the sentence by choosing correct word given in bracket.
Electrolysis is the passage of ___________________
(electricity / electrons)
Complete the sentence by choosing correct word given in bracket.
through a liquid or a solution accompanied by a ___________ (Physical / chemical) change.
From the given list :
NaCl, NaOH, H2O (pure), NH4OH, urea, dil.H2SO4, glucose, acetic acid, H2CO3.
Select :
a) Substances which will behave as strong electrolytes.
b) Substances which will behave as weak electrolytes.
c) Substances which are non-elctrolytes.
Fill in the blank :
Hydrogen and metallic ions are ____________ because they ____________ electrons.
Name : A non-metallic element which is a conductor of electricity.
Choose the correct answer from the option given below:
Which one is weak electrolyte?
Give one example of a substance which contain :
both ions and molecules.
Element X is a metal with a valency 2. Element Y is a non-metal with a valency 3.
If the compound formed between X and Y is melted and an electric current passed through the molten compound, the element X will be obtained at the ______ and Y at the ______ of the electrolytic cell. (Provide the missing words).
