Advertisements
Advertisements
प्रश्न
Why does aluminium not react with water under ordinary conditions?
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.
APPEARS IN
संबंधित प्रश्न
Show the formation of Na2O by the transfer of electrons.
A solution of _________________ in water is green in colour.
(a) CuSO4
(b) FeSO4
(c) ZnSO4
(d) Al2(SO4)3
Fill in the following blank with suitable word:
The white powder formed when magnesium ribbon burns in oxygen is of ....................
Describe the reaction of potassium with water. Write the equation of the reaction involved.
What is the action of water on sodium ? Write equation of the chemical reaction involved.
What happens when a metal reacts with dilute hydrochloric acid? Explain with the help of an example.
Which non-metal has been placed in the reactivity series of metals?
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
Which of the following reactions will not occur? Why not?
(a) MgSO4 (aq) + Cu (s) → CuSO4 (aq) + Mg (s)
(b) CuSO4 (aq) + Fe (s) → FeSO4 (aq) + Cu (s)
(c) MgSO4 (aq) + Fe (s) → FeSO4 (aq) + Mg (s)
Write the chemical equation for the following reaction:
Cinnabar is heated in the presence of air.