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

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प्रश्न

Write the molecular formulae of the following compound.

Sodium aluminate

एक शब्द/वाक्यांश उत्तर
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उत्तर

Sodium aluminate- NaAlO2

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अध्याय 8: Metallugy - Solve the following Questions

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संबंधित प्रश्न

Write the composition of the alloy called bronze.


How are the less reactive metals (which are quite low in the reactivity series) extracted? Explain with the help of an example.


Explain givem equation, what happens when a mixture of Cu2O and Cu2S is heated?


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


The major ore of aluminium is known as:
(a) cinnabar
(b) calamine
(c) bauxite
(d) pyrolusite


The two metals which are extracted by means of electrolytic reduction of their molten salts are:
(a) magnesium and manganese
(b) iron and aluminium
(c) zinc and magnesium
(d) magnesium and aluminium


Which metal can be extracted from the following ore?

bauxite


Give the principles of the froth floatation process.


State why aluminium is extracted from its oxide by electrolysis while copper, lead, iron by reducing agents and mercury and silver by thermal decomposition.


Name the following:
Two metals which are found in the free or native state.


Name the following:
The process in which an ore is heated in air so that oxygen gets added to it to form the oxides.


X is an element in the form of a powder. X burns in oxygen and the product is soluble in water. The solution is tested with litmus. Write down only the word which will correctly complete each of the following sentences:
(a) If X is a metal, then the litmus will turn ______.
(b) If X is a non-metal, then the litmus will turn ______.
(c) If X is a reactive metal, then ______ will be evolved, when X reacts with dilute sulphuric acid.
(d) If X is a non -metal, it will form _ oxide, which will form ______ solution with water.
(e) If X is a non -metal, it will not conduct electricity unless it is carbon in the form of ______.


Compare the properties of a typical metal and a non- metal on the basis of the following:
(a) electronic configuration
(b) nature of oxides
(c) oxidizing or reducing action
(d) conductivity of heat and electricity


Answer the following question :
What is the difference between calcination and roasting.


If Cu, Fe, Zn, Al elements are arranged in increasing order of their reactivity then the correct order would be which of the following?


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


Observe the following diagram and write answers.

  1. Name the method.
  2. Write anode reaction and cathode reaction.
  3. Why fluorspar and cryolite are added in the mixture?

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


Iqbal treated a lustrous, divalent element M with sodium hydroxide. He observed the formation of bubbles in reaction mixture. He made the same observations when this element was treated with hydrochloric acid. Suggest how can he identify the produced gas. Write chemical equations for both the reactions.


Two ores A and B were taken. On heating ore A gives CO2 whereas, ore B gives SO2. What steps will you take to convert them into metals?


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