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

Right or wrong sentence? The electrolysis of alumina combines fluorite and cryolite to increase the solubility in the precipitation method.

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प्रश्न

Right or wrong sentence?

The electrolysis of alumina combines fluorite and cryolite to increase the solubility in the precipitation method.

पर्याय

  • Right

  • Wrong

MCQ
चूक किंवा बरोबर
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उत्तर

The given sentence is wrong.

Explanation:

Cryolite and fluorspar are added to alumina to lower its extremely high melting point and increase its electrical conductivity. They are not used to increase solubility, and the process is electrolytic reduction, not precipitation.

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

संबंधित प्रश्‍न

Name two metals which are found in nature in the free state.


Give reasons.

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Name the most abundant metal in the earth’s crust.


How is zinc extracted from its carbonate ore (calamine)? Explain with equations.


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  1. What are A and B?
  2. Identify C and D.
  3. What will be the action of C on litmus solution? Why?
  4. State whether element B is a solid, liquid or gas at room temperature.
  5. Write formula of the compound formed when element B reacts with an element E having atomic number 5.

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


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painting electric and telegraphic poles


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(b) nature of oxides
(c) oxidizing or reducing action
(d) conductivity of heat and electricity


Name the following:

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


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