Advertisements
Advertisements
Question
Write one reaction in which aluminium oxide behaves as a basic oxide and another in which it behaves as an acidic oxide.
Advertisements
Solution
When aluminium oxide reacts with hydrochloric acid, it behaves as a basic oxide:
Al2O3(s) + 6HCl(aq) → 2AlCl3(aq) + 3H2O(l)
When aluminium oxide reacts with a base like sodium hydroxide, it behaves as an acidic oxide:
Al2O3(s) + 2NaOH(aq) → 2NaAlO2(aq) + H2O(l)
APPEARS IN
RELATED QUESTIONS
‘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:
A student added few pieces of aluminium metal to two test tubes A and B containing aqueous solutions of iron sulphate and copper sulphate. In the second part of her experiment, she added iron metal to another test tubes C and D containing aqueous solutions of aluminium sulphate and copper sulphate.
In which test tube or test tubes will she observe colour change? On the basis of this experiment, state which one is the most reactive metal and why.
Name the metal which has been placed at the bottom of the reactivity series.
What will happen if a strip of zinc is immersed in a solution of copper sulphate?
Complete and balance the following equation:
Cu (NO3)2 (aq) + Zn(s) →
Fill in the following blank with suitable word:
The white powder formed when magnesium ribbon burns in oxygen is of ....................
Fill in the following blank with suitable word:
Calcium is a ................. reactive metal than sodium.
Which of the following elements would yield a neutral oxide?
Na, S, C, K, H
How do non-metals react with hydrogen? Explain with an example.
Name two metals which cannot displace hydrogen from dilute acids.
Name two metals (other than zinc and iron) which can displace hydrogen from dilute hydrochloric acid?
What special name is given to substances like aluminium oxide.
A basic oxide will be formed by the element:
(a) K
(b) S
(c) P
(d) Kr
Write the name and formula of a molecule made up of three atoms of oxygen.
Write a chemical equation to illustrate the use of aluminium for joining cracked railway lines.
Where does the metal aluminium, used in the thermit process, occurs in the reactivity series of metals?
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?
Which of the following property is not responsible for copper to be used as electrical conduction wires?
