Indian army has published the notification for SSC Tech 56 men and SSC Tech 27 women for the course commencing at OTA Chennai from April 2021
Materials around us can be classified into
Elements and compounds
Metals and non-metals
Acids and bases
None of these.
All metals are solids except
Sodium
Calcium
Mercury
Hydrogen.
Metal oxides are of nature
Acidic
Basic
Neutral
All of these.
The metal which can be cut with a knife
Sodium and potassium
Barium and calcium
Sodium and mercury
Potassium and calcium.
When non-metals react with water then
Hydrogen gas is formed
Carbon dioxide gas is formed
Non-metals do not react with water
