Aqueous solution of group 2 is precipitated by adding \[N{{a}_{2}}C{{O}_{3}},\] then this precipitate is tested on flame, no light in visible region is observed, this element can be
A)Ba
B) Mg
C)Ca
D) Sr
Correct Answer:
B
Solution :
[b] Electrons in Mg due to its small size are tightly bound so they cannot be excited by the flame.