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प्रश्न
Write the molecular formulae of the following compound.
Sodium aluminate
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उत्तर
Sodium aluminate- NaAlO2
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संबंधित प्रश्न
Define the Ore.
Name two metals which are found in nature in the free state.
Give the name of one ore of iron. Which iron compound is present in this ore? Write its chemical formula.
Describe the extraction of zinc metal from its sulphide ore (zinc blende). Write equations of the reactions involved.
Explain how, mercury is extracted from its sulphide ore (cinnabar). Give equations of the reactions involved.
Give the chemical formula of :
Bauxite
Give the chemical formula of :
Sodium aluminate
What is meant by concentration of ores?
What is meant by refining of metals? Name the three common methods used for refining.
Complete the incomplete statement with missing words:
Metals are ______ while non-metals are ______ conductors of heat.
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 ______.
Arrange the metals of copper, iron, magnesium, sodium and zinc in the decreasing order of reactivity.
Draw a well-labelled diagram of extraction of Aluminium. Write the anode reaction in electrolytic reduction of Alumina.
Write the name.
The process of strong heating of carbonate ores in insufficient air–
Write the molecular formulae of the following compound.
Cryolite
Explain in brief electrolytic reduction of alumina with a neat labelled diagram.
Which of the following metals exist in their native state in nature?
- Cu
- Au
- Zn
- Ag
- Given below are the steps for extraction of copper from its ore. Write the reaction involved.
- Roasting of copper (I) sulphide
- Reduction of copper (I) oxide with copper (I) sulphide.
- Electrolytic refining
- Draw a neat and well labelled diagram for electrolytic refining of copper
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?
