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Why does aluminium not react with water under ordinary conditions?

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प्रश्न

Why does aluminium not react with water under ordinary conditions?

लघु उत्तरीय
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उत्तर

Aluminium does not react with water under ordinary conditions because of the presence of a thin but tough layer of aluminium oxide on its surface. This layer of aluminium oxide prevents it from reacting with water.

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अध्याय 3: Metals and Non-metals - Exercise 1 [पृष्ठ १६६]

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लखमीर सिंग Chemistry Part 2 [English] Class 10
अध्याय 3 Metals and Non-metals
Exercise 1 | Q 50. (a) | पृष्ठ १६६

संबंधित प्रश्न

Metal A has electronic configuration (2, 8, 1) and metal B has (2, 8, 8, 2). Which is more reactive? Why? Identify these metals.


Which gas is produced when dilute hydrochloric acid is added to a reactive metal? 


Name the metal which has been placed at the bottom of the reactivity series.


Explain why, the surface of some metals acquires a dull appearance when exposed to air for a long time.


Complete and balance the following equation:

\[\ce{Na + O2 ->}\]


Name two metals which cannot displace hydrogen from dilute acids.


You are given samples of three metals - sodium, magnesium and copper. Suggest any two activities to arrange them in order of their decreasing reactivities.


Write one reaction in which aluminium oxide behaves as a basic oxide and another in which it behaves as an acidic oxide.


Name another metal oxide which behaves like aluminium oxide.


Write the equation for the reaction of:

Zinc with dilute hydrochloric acid.

Name the products formed in the given case. Also indicate the physical states of all the substances involved.


Name one metal more reactive than hydrogen.


Out of aluminium, copper, calcium and tin, the most reactive metal is:


Which one of the following four metals would be displaced from the solution of its salt by the other three metals?


An element X forms two oxides XO and XO2. The oxide XO has no action on litmus solution but oxide XO2 turns litmus solution red.

  1. What is the nature of oxide XO?
  2. What is the nature of oxide ХО2?
  3. Would you call element X a metal or a non-metal? Give reason for your choice.
  4. Can you give an example of element like X?

If A, B, C, D, E, F, G, H, I, J and K represent metals in the decreasing order of their reactivity, which one of them is most likely to occur in a free state in nature?


Write the chemical equation of the above process.


Explain the following: 

Reactivity of aluminium decrease if it is dipped in nitric acid.


Why is acidified water considered to be a good conductor of electricity?


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