Answer is:
Mg, Ca, Sr, Ba
Explanation:
Due to increase in size, ionisation energy decreases down the group.
Answer is:
BeO < MgO < CaO < BaO
Explanation:
Basic characters of oxides decreases down the group.
Answer is:
Dicalcium silicate
Explanation:
Dicalcium silicate contains more SiO2 as compared to tricalcium silicate. Thus, it has slow setting rate.
Answer is:
Ca
Explanation:
Ca is used as a scavenger of oxygen and nitrogen in metallurgical operations.