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प्रश्न
Explain, why during the electrolysis of copper sulphate using copper electrodes, the colour of solution does not fade?
उत्तर
During the electrolysis of copper sulphate using copper electrode, the number of copper ions remains same as that for evey copper ions discharged at the cathode, an ion of copper is formed at the anode which goes in the
solution. Thus the colour intensity does not change.
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संबंधित प्रश्न
Complete the following by selecting the correct option from the choices given:
The divalent metal whose oxide is reduced to metal by electrolysis of its fused salt is __________. (Al/Na/Mg/K)
The electrolysis of acidified water is an example of :
(A) Reduction
(B) Oxidation
(C) Redox reaction
(D) Synthesis
Electrolysis of aqueous sodium chloride solution will form ________ at the cathode. (Hydrogen gas / Sodium metal)
Explain the following:
Hydrochloric acid is a good conductor of electricity.
Choose the correct words to fill in the blanks.
Cations are formed by _______ (loss/ gain) of electrons and anions are formed by ________( loss/gain) of electrons.
A solution contains magnesium ions (Mg+2), iron (II) ions (Fe+2) and copper ions (Cu+2). On passing an electric current through this solution, which ions will be the first to be discharged at the cathode? Write the equation for the cathode reaction.
Select the correct answer from the choices a,b,c and d which are given. Write only the letter corresponding to the correct answer.
A compound which liberates reddish brown gas around the anode during the electrolysis in its molten state is:______________
Fill in the blank from the choices given below :
A molecule of _____ contains a triple bond.
M is a metal above hydrogen in the activity series and its oxide has the formula M2O. The oxide when dissolved in water forms the corresponding hydroxide which is a good conductor of electricity. In the above context answer the following:
- What kind of combination exists between M and O?
- How many electrons are there in the outermost shell of M?
- Name the group to which M belongs.
- State the reaction taking place at the cathode.
- Name the product at the anode.
State the observation at the anode and at the cathode during the electrolysis of :
Fused lead bromide using graphite electrodes
