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

Write Chemical Equation for the Event.Aluminium Came in Contact with Air.

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प्रश्न

Write chemical equation for the event.
Aluminium came in contact with air.

टीपा लिहा
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उत्तर

Aluminum came in contact with air.
Aluminum is a very reactive metal. The outer surface of the metal is actually covered by a very thin layer of oxide which keeps the metal protected from the air. But when the oxide layer is damaged, aluminum comes in contact with the air. It is easily attacked by air. Then aluminum starts reacting with the oxygen. It will burn as bright white flame to change into aluminum(III) oxide.
Chemical Equation:   

\[4Al + 3 O_2 \to 2A l_2 O_3\]
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पाठ 8: Metallurgy - Exercise [पृष्ठ १०९]

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बालभारती Science and Technology Part 1 [English] Standard 10 Maharashtra State Board
पाठ 8 Metallurgy
Exercise | Q 9. a. | पृष्ठ १०९

संबंधित प्रश्‍न

What do you observe when a few pieces of iron are dropped in a blue solution of copper sulphate?


Fill in the blank

When a piece of copper is added to silver nitrate solution, it turns ............in colour.


How will you obtain Magnesium oxide from magnesium.

Also give balanced equations for the reactions


How will you obtain  Silver chloride from silver nitrate.

Also give balanced equations for the reactions


How will you obtain Zinc chloride from zinc.

Also give balanced equations for the reactions


Write a chemical equation for the event.

Iron filings are dropped in aqueous solution of copper sulphate.


Write a chemical equation for the following event.

Zinc oxide is dissolved in dilute hydrochloric acid.


State what is meant by the ‘reactivity series of metals’


Give a balanced equation for the reversible catalytic reaction involving nitrogen as one of the reactants.


Select the correct answer for the statement given below:

The catalyst used in the catalytic reaction involving the reactants nitrogen and hydrogen.


Select the correct answer for the statement given below:

A neutral oxide which does not react with an acid or a base to give salt and water.


Complete the statement by filling in the blank with the correct word:

The metal which reacts with steam and the reaction is reversible is ________.


In preparation of Aqua regia hydrochloric acid and _______ acid are mixed.


Classify the following metals based on their reactivity.
Cu, Zn, Ca, Mg, Fe, Na, Li, Hg

More reactive Moderately reactive Less reactive
     
     

Observe the following diagram and identify the type of reaction and write observation.


Which among the following statements is incorrect for magnesium metal?


Which among the following alloys contain mercury as one of its constituents?


Explain the following

  1. Reactivity of Al decreases if it is dipped in HNO3
  2. Carbon cannot reduce the oxides of Na or Mg
  3. NaCl is not a conductor of electricity in solid state whereas it does conduct electricity in aqueous solution as well as in molten state
  4. Iron articles are galvanised.
  5. Metals like Na, K, Ca and Mg are never found in their free state in nature.

Arrange the following as per the instruction given in the bracket:

Al, K, Mg, Ca (decreasing order of its reactivity)


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