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Why Does Aluminium Not React with Water Under Ordinary Conditions? - Science

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प्रश्न

Why does aluminium not react with water under ordinary conditions?

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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 १३४]

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लखमीर सिंग Chemistry (Science) [English] Class 10
अध्याय 3 Metals and Non-metals
Exercise 1 | Q 50.1 | पृष्ठ १३४

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.


Write equations for the reactions of iron with steam. 


Write equations for the reactions of calcium and potassium with water.


Write the chemical reaction when iron reacts with dilute H2SO4.


Write the electron-dot structures for sodium, oxygen and magnesium.


An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be:


Fill in the following blank with suitable word:

 Magnesium liberates ............... gas on reacting with hot boiling water.


 What happens when magnesium reacts with very dilute nitric acid? Write an equation for the reaction involved.


Can we keep sodium immersed under water? Why?


What is the action of water on magnesium ? Write equation of the chemical reaction involved.


A basic oxide will be formed by the element:
(a) K
(b) S
(c) P
(d) Kr


Out of aluminium, copper, calcium and tin, the most reactive metal is:
(a) aluminium
(b) copper
(c) tin
(d) calcium


Out of the following oxides, the amphoteric oxide is:
(a) Fe2O3
(b) Al2O3
(c) P2O5
(d) N2O


An element is soft and can be cut with a knife. If is very reactive and cannot be kept open in the air. It reacts vigorously with water. The element is most likely to be:
(a) Mg
(b) S
(c) P
(d) Na


When calcium metal is added to water, the gas evolved does not catch fire but the same gas evolved on adding sodium metal to water catches fire. Why is it so?


What are noble gases


Metals are generally hard. Which of the following metals is an exception and can be cut with a knife?


Metals are generally solid. Which of the following metals is in the liquid state at room temperature?


Which of the following property is not responsible for copper to be used as electrical conduction wires?


Tungsten wire is used in electric bulbs.


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