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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. - Science and Technology 1

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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 - Exercises [पृष्ठ १०९]

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बालभारती Science and Technology 1 [English] Standard 10 Maharashtra State Board
पाठ 8 Metallurgy
Exercises | Q 9.1 | पृष्ठ १०९

संबंधित प्रश्‍न

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 chemical equation for the event.

Electrolysis of alumina is done.


Write a chemical equation for the following event.

Zinc oxide is dissolved in dilute hydrochloric acid.


Divide the metals Cu, Zn, Ca, Mg, Fe, Na, Li into three groups, namely reactive metals, moderately reactive metals and less reactive metals.


With reference to Water explain with suitable examples of how the reactivity of the metals could be differentiated.


With reference to Acid explain with a suitable example of how the reactivity of the metals could be differentiated.


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.


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
     
     

Explain the following reaction with the balanced equation.

Reaction of aluminium with oxygen


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


Which of the following is the correct arrangement of the given metals in ascending order of their reactivity?

Zinc, Iron, Magnesium, Sodium


A solution of CuSO4 was kept in an iron pot. After few days the iron pot was found to have a number of holes in it. Explain the reason in terms of reactivity. Write the equation of the reaction involved.


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.

Of the three metals X, Y and Z. X reacts with cold water, Y with hot water and Z with steam only. Identify X, Y and Z and also arrange them in order of increasing reactivity.


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