Advertisements
Advertisements
Question
What is the action of water on aluminium? Write the equation of the chemical reaction involved.
Advertisements
Solution
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.
\[\ce{\underset{Aluminium}{2Al_{(s)}} + \underset{Steam}{3H2O_{(g)}} -> \underset{Aluminium oxide}{Al2O3_{(s)}} + \underset{Hydrogen}{3H2_{(g)}}}\]
APPEARS IN
RELATED QUESTIONS
_________ solution is blue in colour.
(a) CuSO4
(b) FeSO4
(c) ZnSO4
(d) Al2(SO4)3
Why is sodium kept immersed in kerosene oil?
Which gas is produced when dilute hydrochloric acid is added to a reactive metal?
Food cans are coated with tin and not with zinc because ______.
State whether the following statement is true or false:
Non-metals react with dilute acids to produce a gas which burns with a ‘pop’ sound.
Complete and balance the following equation:
\[\ce{Cu(NO3)2_{(aq)} + Zn_{(s)} ->}\]
Ordinary aluminium strips are not attacked by water because of the presence of a layer of ______ on the surface of aluminium.
How do non-metals react with hydrogen? Explain with an example.
What happens when a rod of zinc metal is dipped into a solution of copper sulphate? Give chemical equation of the reaction involved.
Name two metals which cannot displace hydrogen from dilute acids.
Describe the reaction of potassium with water. Write the equation of the reaction involved.
The elements whose oxides can turn litmus solution red are:
(a) lithium and sodium
(b) copper and potassium
(c) carbon and hydrogen
(d) phosphorus and sulphur
Zinc oxide is a metal oxide. Which of the following term best describes the nature of zinc oxide:
(a) an acidic oxide
(b) a basic oxide
(c) an amphoteric oxide
(d) a neutral oxide
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
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?
Choose the correct alternative and rewrite the following:
Reaction of iron nails whith copper sulphate solution is an example of _____________________
Write the chemical equation of the above process.
Explain the following:
Reactivity of aluminium decrease if it is dipped in nitric acid.
Write the chemical equation for the following reaction:
Manganese dioxide is heated with aluminum powder.
Metals are generally hard. Which of the following metals is an exception and can be cut with a knife?
