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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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संबंधित प्रश्न
Iron is
(a) More reactive than zinc
(b) More reactive than aluminium
(c) Less reactive than copper
(d) Less reactive than aluminium
Which gas is produced when dilute hydrochloric acid is added to a reactive metal?
Show the formation of Na2O by the transfer of electrons.
Give reasons why copper is used to make hot water tanks and not steel (an alloy of iron).
The solution of Aluminium sulphate in water is .....................
(a) Green
(b) Colourless
(c) Pink
(d) Blue
From amongst the metals sodium, calcium aluminium, copper and magnesium, name the metal:
(i) which reacts with water only on boiling, and
(ii) another which does not react even with steam.
Which of the two metals is more reactive: copper or silver?
Fill in the following blank with suitable word:
Magnesium liberates ............... gas on reacting with hot boiling water.
What type of oxides are formed when non-metals react with oxygen? Explain with an example.
Give one example, with equation, of the displacement of hydrogen by a metal from an acid.
Write the equation for the reaction of Iron with dilute hydrochloric acid.
Name the products formed. Also indicate the physical states of all the substances involved.
Hydrogen is not a metal but still it has been assigned a place in the reactivity series of metals. Why?
An element X reacts with hydrogen, when heated, to form a covalent hydride H2X. If H2X has a smell of rotten eggs, the element X is likely to be:
(a) carbon
(b) sulphur
(c) chlorine
(d) phosphorus
The metals which can produce amphoteric oxides are:
(a) sodium and aluminium
(b) zinc and potassium
(c) calcium and sodium
(d) aluminium and zinc
CuSO4(aq) + Fe(s) → FeSO4(aq) + Cu(s)
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.
Name a metal which does not react with cold as well as hot water but reacts with steam.
Name a metal which It does not react with any physical state of water?
Explain the following:
Reactivity of aluminium decrease if it is dipped in nitric acid.
An alkali metal A gives a compound B (molecular mass = 40) on reacting with water. The compound B gives a soluble compound C on treatment with aluminium oxide. Identify A, B and C and give the reaction involved.
Find the odd one out:
