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महाराष्ट्र राज्य शिक्षण मंडळएस.एस.सी (इंग्रजी माध्यम) इयत्ता १० वी

Right or wrong sentence? In the electrolytic dissipation method of alumina, the lining of graphite acts as an anode.

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प्रश्न

Right or wrong sentence?

In the electrolytic dissipation method of alumina, the lining of graphite acts as an anode.

पर्याय

  • Right

  • Wrong

MCQ
चूक किंवा बरोबर
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उत्तर

The given sentence is wrong.

Explanation:

In the electrolytic reduction of alumina (the Hall-Héroult process), the graphite lining of the steel tank acts as the cathode (the negative electrode). The anode (the positive electrode) consists of a separate set of graphite rods that are suspended into the molten electrolyte mixture.

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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 8: Metallugy - Right or Wrong sentence [पृष्ठ २१]

संबंधित प्रश्‍न

Name the electrode at which aluminium metal is produced.


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An ore of manganese metal is ______.


Which of the following is an ore of mercury metal?


Which metal can be extracted from the following ore?

Haematite


Some metallic oxides can be reduced by hydrogen, carbon and carbon monoxide and some cannot. Explain.


Aluminum is used in thermite welding:

what is thermit?


Identify the process given in following passage and draw neat labelled diagram showing the process.
          Electrolysis of molten mixture of alumina (melting point > 20000C) is done in a steel tank. The tank has a graphite lining on the inner side. This lining does the work of a cathode. A set of graphite rods dipped in the molten electrolyte works as anode. Cryolite (Na3AlF6) and fluorspar (CaF2) are added in the mixture to lower its melting point upto 10000C.

 


Explain the following:
Galvanization protects iron from rusting.


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 _________


Name the following :

The Process of heating an ore to a high temperature in the presence of air.


Atomic number of aluminium is _______ and its electronic configuration is _______.


Bauxite reacts with sodium hydroxide in the Bayer’s process.


Explain the following reaction with the balanced equation.

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Explain the following reaction with the balanced equation.

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Observe the following diagram and write answers.

  1. Name the method.
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(i) Cu

(ii) Au

(iii) Zn

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  1. Cu
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  3. Zn
  4. Ag

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The given reaction shows one of the processes to extract the metals like Iron and Manganese.

\[\ce{MnO2(s) + Al(s) -> Mn(l) + Al2O3(s) + Heat}\]

Identify the substance oxidised and reduced in the above reaction.


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