Alloys are homogeneous mixture of metal with a metal or non-metal. Which among the following alloys contain non-metal as one of its constituents?
- (a) Brass
- (b) Bronze
- (c) Amalgam
- (d) Steel
Physical properties of metals and non-metals
High importanceUsually 2 marks a paper · mostly MCQs and case-based questions · asked in 4 of the last papers
Notes are being written
The board questions below are real and complete — they come from the CBSE papers themselves. The written notes for this topic are still being prepared.
Board questions on this topic
8 from the CBSE papers we hold — the exact wording the board used.
The products formed when Aluminium and Magnesium are burnt in the presence of air respectively are :
- (a) Al_3O_4 and MgO_2
- (b) Al_2O_3 and MgO
- (c) Al_3O_4 and MgO
- (d) Al_2O_3 and MgO_2
A metal and a non-metal that exists in liquid state at the room temperature are respectively:
- (a) Bromine and Mercury
- (b) Mercury and Iodine
- (c) Mercury and Bromine
- (d) Iodine and Mercury
Oxides of aluminium and zinc are:
- (a) acidic
- (b) basic
- (c) amphoteric
- (d) neutral
Almost all metals combine with oxygen to form metal oxides; metal oxides are generally basic but some show both basic and acidic behaviour, and different metals show different reactivities towards oxygen.
What happens when copper is heated in air? (Give the equation of the reaction involved).
metal oxides are generally basic but some show both basic and acidic behaviour.
Why are some metal oxides categorized as amphoteric? Give one example.
reactions of metal oxides with water and with a base.
Complete the following equations: (i) Na_2O(s) + H_2O(l) -> (ii) Al_2O_3 + 2NaOH ->
non-metal reacting with oxygen - internal choice for sub-part (c).
On burning Sulphur in oxygen a colourless gas is produced. (i) Write chemical equation for the reaction. (ii) Name the gas formed. (iii) State the nature of the gas. (iv) What will be the action of this on a dry litmus paper?