94) The salts of which alkaline earth metal are used in the form of manure?

Answer is:

Ca

They are far above hydrogen in electrochemical series based on oxidation potential

They are far below hydrogen in electrochemical series based on oxidation potential

Their ionisation potential is less than that of other elements

They contain only one electron in their outermost shell

Answer is:

Answer is:

Mg, Ca, Sr, Ba

Ca, Sr, Ba, Mg

Sr, Ba, Mg, Ca

Ba, Mg, Ca, Sr

Answer is:

Explanation:

Due to increase in size, ionisation energy decreases down the group.

MgO < BeO < CaO < BaO

BeO < MgO < CaO < BaO

BaO < CaO < MgO < BeO

CaO < BaO < BeO < MgO

Answer is:

Explanation:

Basic characters of oxides decreases down the group.