Advertisements
Advertisements
Question
Take any one alkali metal and write its reaction with (i)oxygen (ii)water (iii)acid.
Solution
The reaction of an alkali metal with oxygen - React rapidly with oxygen
4Na + O2 → 2Na2O
The reaction of an alkali metal with water - React with water violently and produce hydrogen
2M + 2H2O → 2MOH + H2
The reaction of an alkali metal with acid - React violently with dilute. HCl and dilute. H2SO4 to produce hydrogen
2M + 2HCl → 2MCl + H2
APPEARS IN
RELATED QUESTIONS
Write the reactions of the first three alkaline earth metals with dilute hydrochloric acid.
How many electrons do inert gases have in their valence shells?
Name the gas used in:
Filling balloons
Name the gas used in:
Light bulbs
Give reason:
Alkali metals and halogens do not occur free in nature.
Write a short note on the following type of element –
alkaline earth metals
‘The periodic table contains elements methodically grouped together’.
State the main helpful features of the long form of the periodic table.
Give a reason for the following:
Noble gases do not form compounds readily.
Match the elements of List – I with their type from List – II.
| List – I | List – II |
| 1. Highly reactive, univalent metals | A: Halogens |
| 2. Highly reactive, univalent non-metals | B: Transition elements |
| 3. Unreactive, inert elements | C: Alkali metals |
| 4. Elements of group 3 to 12 [IB to VII B and VIII] | D: Lanthanide series |
| 5. Radioactive elements | E: Noble gases |
| F: Actinide series |
