JAMB Chemistry 2015 Paper

Concept:Flame tests help identify metal ions by the characteristic colour they produce when heated in a flame.Explanation:Calcium ($\mathrm{Ca}$) burns with a brick-red flame.This is a distinctive test for calcium compounds.Sodium ($\mathrm{Na}$) gives a golden-yellow flame.Magnesium ($\mathrm{Mg}$) burns with a brilliant white light.Lead ($\mathrm{Pb}$) does not show a brick-red flame.Therefore, only calcium matches the description given in the question.Answer:B. $\mathrm{Ca}$