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प्रश्न
Write a chemical equation to illustrate the use of aluminium for joining cracked railway lines.
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उत्तर
\[\ce{\underset{oxide}{\underset{Iron (III)}{Fe2O3_{(s)}}} + \underset{Aluminium}{2Al_{(s)}} -> \underset{Iron}{2Fe_{(l)}} + \underset{oxide}{\underset{Aluminium}{Al2O3_{(s)}}} + Heat}\]
संबंधित प्रश्न
Write equations for the reactions of iron with steam.
Differentiate between metal and non-metal on the basis of their chemical properties.
Give reason for the following:
Blue colour of copper sulphate solution is destroyed when iron filings are added to it.
Explain why, the surface of some metals acquires a dull appearance when exposed to air for a long time.
What type of oxides are formed when metals combine with oxygen? Explain with the help of an example.
What is meant by the reactivity series of metals? Arrange the following metals in an increasing order of their reactivities towards water:
Zinc, Iron, Magnesium, Sodium
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 X forms two oxides XO and XO2. The oxide XO has no action on litmus solution but oxide XO2 turns litmus solution red.
(a) What is the nature of oxide XO?
(b) What is the nature of oxide XO2?
(c) Would you call element X a metal or a non-metal? Give reason for your choice.
(d) Can you give an example of element like X?
What is the cause of chemical bonding (or chemical combination) of atoms of elements?
