Advertisements
Advertisements
Question
What type of oxides are formed when metals combine with oxygen? Explain with the help of an example.
Advertisements
Solution
When metals react with oxygen to form metal oxides. Metal oxides are basic in nature. Some of the metal oxides react with water to form alkalis. Metal oxides, being basic, turn red litmus solution blue.
The intensity of the reaction with oxygen depends on the metal’s chemical reactivity. Certain metals react with oxygen at ambient temperature; others require heating, while some require intense heating to react.
Sodium metal reacts with the oxygen of air at room temperature to form a basic oxide called sodium oxide.
\[\ce{\underset{(Metal)}{\underset{Sodium}{4Na_{(s)}}} + \underset{(From air)}{\underset{Oxygen}{O2_{(g)}}} -> \underset{(Basic oxide)}{\underset{Sodium oxide}{2Na2O_{(s)}}}}\]
APPEARS IN
RELATED QUESTIONS
_________ solution is blue in colour.
(a) CuSO4
(b) FeSO4
(c) ZnSO4
(d) Al2(SO4)3
Iron is
(a) More reactive than zinc
(b) More reactive than aluminium
(c) Less reactive than copper
(d) Less reactive than aluminium
Name the following:
Metals which forms an amphoteric oxide.
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.
Write an equation for the reaction of:
Sodium with oxygen
Complete and balance the following equation:
\[\ce{Na + O2 ->}\]
Ordinary aluminium strips are not attacked by water because of the presence of a layer of ______ on the surface of aluminium.
With the help of examples, describe how metal oxides differ from non-metal oxides.
What is the nature of the oxide Na2O? What happens when it is dissolved in water? Write the chemical equation of the reaction involved.
Arrange the following metals in order of their chemical reactivity, placing the most reactive metal first:
Magnesium, Copper, Iron, Sodium, Zinc, Lead, Calcium
Which gas is produced when dilute hydrochloric acid is added to a reactive metal?
What is the action of water on aluminium? Write the equation of the chemical reaction involved.
Which non-metal has been placed in the reactivity series of metals?
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 ______.
The metals which can produce amphoteric oxides are ______.
In a solution of lead acetate, a strip of metal M was dipped. After some time, lead from the solution was deposited on the metal strip. Which metal is more reactive, M or lead?
What is the cause of chemical bonding (or chemical combination) of atoms of elements?
Write the name and formula of a molecule made up of three atoms of oxygen.
Write the chemical equation for the following reaction:
Calcium metal reacts with water.
A cable manufacturing unit tested few elements on the basisof their physical properties.
| Properties | W | X | Y | Z |
| Malleable | Yes | No | No | Yes |
| Ductile | Yes | No | No | Yes |
| Electrical conductivity | Yes | Yes | Yes | No |
| Melting Point | High | Low | Low | High |
Which of the above elements were dicarded for usage by the company?
