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Give Appropriate Scientific Reasons for the Following Statement : Zinc Oxide Can Be Reduced to Zinc by Using Carbon Monoxide, but Aluminium Oxide Cannot Be Reduced by a Reducing Agent. - Chemistry

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प्रश्न

Give appropriate scientific reasons for the following statement :
Zinc oxide can be reduced to zinc by using carbon monoxide, but aluminium oxide cannot be reduced by a reducing agent.

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उत्तर

Zinc is lower in the reactivity series, so it is comparatively less reactive. Hence, it is reduced by using carbon monoxide. But aluminium is very reactive; hence, it cannot be reduced by using a reducing agent and it can be reduced only by electrolytic reduction.

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Electrolytes
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अध्याय 6: Electrolysis - Exercise 8 [पृष्ठ १५२]

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फ्रैंक Chemistry - Part 2 [English] Class 10 ICSE
अध्याय 6 Electrolysis
Exercise 8 | Q 7.1 | पृष्ठ १५२

संबंधित प्रश्न

Name a salt which is a weak electrolyte.


How is electrolytic dissociation different from thermal dissociation?


What should be the physical state of lead bromide if it is to conduct electricity?


What particles are present in pure lead bromide?


A metal article is to be electroplated with silver. The electrolyte selected is sodium argentocyanide.

  1. What kind of salt is sodium argentocyanide?
  2. Why is it preferred to silver nitrate as an electrolyte?
  3. State one condition to ensure that the deposit is smooth, firm and long lasting.
  4. Write the reaction taking place at the cathode.
  5. Write the reaction taking place at the anode.

Aqueous solution of nickel sulphate contains \[\ce{Ni^{+2}}\] and \[\ce{SO^{-2}_{4}}\] ions.

  1. Which ion moves towards the cathode?
  2. What is the product at the anode?

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:______________


Copper sulphate solution is electrolyzed using copper electrodes. Study the diagram given alongside and answer the questions that follow.

  1. Which electrode to your left or right is known as the oxidizing electrode and why?
  2. Write the equation representing the reaction that occurs.
  3. State two appropriate observations for the above electrolysis reactions.

Give appropriate scientific reasons for the following statement:

During electrolysis of molten lead bromide, graphite anode is preferred to other electrodes.


Identify the substance underlined in each of the following case :
he electrolyte used for electroplating an article with silver.


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