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

Write the molecular formulae of the following compound. Fluorspar - Science and Technology 1

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प्रश्न

Write the molecular formulae of the following compound.

Fluorspar

एक शब्द/वाक्यांश उत्तर
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उत्तर

Fluorspar- CaF2

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पाठ 8: Metallugy - Solve the following Questions

संबंधित प्रश्‍न

Which of the following pairs will give displacement reactions?


Why does aluminium not corrode right through?


Name the gas produced when calamine ore is calcined.

 


Name three other metals which are extracted in a manner similar to sodium.


Which metal is extracted from calamine ore?


Metals X and Y can be recovered from the anode mud left behind after the electrolytic refining of copper metal. The coins made of metal X look new even after several years of use but the coins made of metal Y lose their shine gradually and get blackened soon. When metal X is alloyed with a small amount of metal Y, it becomes hard and hence suitable for making ornaments. What are metals X and Y? Also state the colour of metal X.


Give the principles of the hydrolytic method.


Give the principles of the froth floatation process.


Aluminum is used in thermite welding:

what is thermit?


Give the chemical formula of :
 Cryolite 


Give the chemical formula of : 
 Sodium aluminate 


 Answer the following questions based on the extraction of aluminium from alumina by Hall - Heroult’s Process : 
What is the function of cryolite used along with alumina as the electrolyte? 


What is meant by refining of metals? Name the three common methods used for refining.


Which one of the following is not true of metal :
Metals are good conductors of electricity.


Which one of the following is not true of metal :
Metals form non-polar covalent compounds


choose the most appropriate term to match the given description.
Heating of the ore in the absence of air to high temperature


Write the molecular formulae of the following compound.

Cryolite


Explain the following reaction with the balanced equation.

Dry aluminium hydroxide is ignited at 1000 °C


Explain the following reaction with the balanced equation.

Zinc sulphide is heated strongly in excess of air


Which of the following metals exist in their native state in nature?

  1. Cu
  2. Au
  3. Zn
  4. Ag

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