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प्रश्न
What is the action of water on aluminium? Write the equation of the chemical reaction involved.
Explain the action of the following on aluminium:
Water
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उत्तर
Aluminium metal does not react with water under ordinary conditions because of the presence of a thin (but tough) layer of aluminium oxide on its surface. Aluminium reacts with steam to form aluminium oxide and hydrogen gas.
\[\ce{\underset{Aluminium}{2Al_{(s)}} + \underset{Steam}{3H2O_{(g)}} -> \underset{Aluminium oxide}{Al2O3_{(s)}} + \underset{Hydrogen}{3H2_{(g)}}}\]
संबंधित प्रश्न
_________ solution is blue in colour.
(a) CuSO4
(b) FeSO4
(c) ZnSO4
(d) Al2(SO4)3
‘E’ is an element which reacts with oxygen to form an oxide E2O. An aqueous solution of E2O turns red litmus blue, so:
i. What is the nature of oxide E2O ?
ii. Write the name of element ‘E’.
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 ______.
Differentiate between metals and non-metals on the basis of their chemical properties.
Give reasons why copper is used to make hot water tanks and not steel (an alloy of iron).
What changes in the colour of iron nails and copper sulphate solution do you observe after keeping the iron nails dipped in copper sulphate solution for about 30 minutes?
Name two metals which form amphoteric oxides.
Name the metal which has been placed at the top of the reactivity series.
Which of the two metals is more reactive?
Copper or silver
What will happen if a strip of copper is kept immersed in a solution of silver nitrate (AgNO3)?
Calcium is a ______ reactive metal than sodium.
Name two metals which can, however, liberate hydrogen gas from very dilute nitric acid.
Which non-metal has been placed in the reactivity series of metals?
You are given a solution of AgNO3. Which of the following do you think cannot displace Ag from AgNO3 solution?
Out of aluminium, copper, calcium and tin, the most reactive metal is:
\[\ce{CuSO4_{(aq)} + Fe_{(s)} -> FeSO4_{(aq)} + Cu_{(s)}}\]
\[\ce{FeSO4_{(aq)} + Zn_{(s)} -> ZnSO4_{(aq)} + Fe_{(s)}}\]
On the basis of the above reactions, indicate which is most reactive and which is least reactive metal out of zinc, copper and iron.
In nature, metal A is found in a free state while metal B is found in the form of its compounds. Which of these two will be nearer to the top of the activity series of metals?
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?
Arrange the following metals in the increasing order of their reactivities:
Copper, Zinc, Aluminium, and Iron
