Question

arrange the following element in order of increasing reactivity.
sodium , magnesium , copper , zinc, aluminium
2) an oxide solution of which of the following element will turn blue litmus red

3) which non metal is used in making pencil lead
4) identify the most reactive and least reactive metal amongest the following.
aluminium , potassium , copper, zink , gold​

Answer 1

1)According to the increasing order of there reactivity, the given elements are arranged as Copper<Zinc<Aluminium<Magnesium<Sodium

2) non-metal oxides like carbon dioxide

3) graphite

4)Most Reactive :- Potassium

Least Reactive :- Gold