A) Ca
B) Ba
C) Mg
D) Li
Correct Answer: C
Solution :
In group IIA, Be and Mg do not impart colour to flame. Their electrons being strongly bonded do not get excited at the temperature of the bunsen flame. Other elements give colour with flame. \[\underset{Crimson\text{ }red}{\mathop{Li}}\,\,\] \[\underset{Apple\text{ }green}{\mathop{Ba}}\,\] \[\underset{Brick\text{ }red}{\mathop{Ca}}\,\]
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