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If Cu, Fe, Zn, Al elements are arranged in increasing order of their reactivity then the correct order would be which of the following? - Science and Technology 1

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प्रश्न

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

विकल्प

  • Cu, Fe, Zn, Al

  • Al, Cu, Fe, Zn

  • Zn, Al, Cu, Fe

  • Fe, Zn, Al, Cu

MCQ
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उत्तर

Cu, Fe, Zn, Al

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  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 8: Metallugy - Choose the correct option.

संबंधित प्रश्न

In the extraction of aluminium: Write the function and formula of cryolite in the extraction of aluminium.


In the extraction of aluminium: Draw the diagram for the extraction of aluminium.


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


Name the method by which aluminium metal is extracted.


Define the term mineral.


Name the electrode at which aluminium metal is produced.


Describe the extraction of zinc metal from its sulphide ore (zinc blende). Write equations of the reactions involved.


An element A which is a part of common salt and kept under kerosene reacts with another element B of atomic number 17 to give a product C. When an aqueous solution of product C is electrolysed then a compound D is formed and two gases are liberated.
(a) What are A and B?
(b) Identify C and D.
(c) What will be the action of C on litmus solution? Why?
(d) Write formula of the compound formed when element B reacts with an element E having atomic number 5.


Give reasons, why aluminum is used in:

painting electric and telegraphic poles


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Gangue


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Why is powdered coke sprinkled on top of the electrolyte? 


Explain the following:
Galvanization protects iron from rusting.


How many valence electrons are present in metals ?


Which one of the following is not true of metal :
 Metals are malleable and ductile


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


Gold and silver are active metals.


Explain the characteristics of ionic compounds.


Explain the following reaction with the balanced equation.

Ferric oxide is reacted with aluminium.


2 mL each of concentrated HCl, HNO3 and a mixture of concentrated HCl and concentrated HNO3 in the ratio of 3 : 1 were taken in test tubes labelled as A, B and C. A small piece of metal was put in each test tube. No change occurred in test tubes A and B but the metal got dissolved in test tube C respectively. The metal could be


The given reaction shows one of the processes to extract the metals like Iron and Manganese.

\[\ce{MnO2(s) + Al(s) -> Mn(l) + Al2O3(s) + Heat}\]

Give a reason why Aluminium is preferably used in thermite reactions.


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