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

Write the molecular formulae of the following compound. Cryolite

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प्रश्न

Write the molecular formulae of the following compound.

Cryolite

एक शब्द/वाक्यांश उत्तर
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उत्तर

Cryolite- Na3AlF6

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पाठ 8: Metallugy - Solve the following Questions [पृष्ठ २९]

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संबंधित प्रश्‍न

Write the steps involved in the extraction of pure metals in the middle of the activity series from their carbonate ores.


Bronze is an alloy of copper and ______.


How is aluminium metal extracted? Explain with the help of an equation.


Which gas is produced during the extraction of aluminium? At which electrode is this gas produced?


The metal which can be extracted simply by heating the cinnabar ore in air is ______.


During galvanisation, iron metal is given a thin coating of one of the following metals. This metal is:


The articles made of silver metal become dark on prolonged exposure to air. This is due to the formation of a layer of its ______.


The metal which can be extracted from pyrolusite ore is ______.


A black metal oxide XO2 is used as a catalyst in the preparation of oxygen gas from potassium chlorate. The oxide XO2 is also used in ordinary dry cells. The metal oxide XO2 cannot be reduced satisfactorily with carbon to form metal X.

  1. Name the metal X.
  2. Name the metal oxide XO2.
  3. Which reducing agent can be used to reduce XO2 to obtain metal X?
  4. Name another metal which can also be extracted by the reduction of its oxide with the above reducing agent.

Name the following:
The process of heating a substance very strongly in such a way that it does not combine with oxygen.


The following question relate to the extraction of aluminium by electrolysis.
Give the equation for the reaction which takes place at the cathode.


Name a non- metal that has a metallic luster and sublimes on heating.


Which one of the following is not true of metal :
Metal will have 1 or 2 or 3 electrons in their valence shell.


Name the following:
A steel grey coloured solid non-metal.


Name the process used for the enrichment of sulphide ore.


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


Write the molecular formulae of the following compound.

Sodium aluminate


Explain Bayer’s process.


Explain in brief electrolytic reduction of alumina with a neat labelled diagram.


In extraction of copper, the flux used is ____________.


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