Which of the following metals reacts slowly with cold water?

Assessment: WAEC SSCE - Chemistry - 2019 (Objective) Subject: Chemistry

Question 1 Report

Which of the following metals reacts slowly with cold water?

Answer Details
Of the given options, calcium is the metal that reacts slowly with cold water. Calcium reacts with water, producing hydrogen gas and calcium hydroxide. The reaction is exothermic but the heat produced is not sufficient to ignite the hydrogen gas. The other metals listed in the options - iron, silver, and potassium - are more reactive with water than calcium. Iron reacts with steam, while silver and potassium react vigorously with cold water. Therefore, the correct option is "Calcium".
Read lesson note on Metals And Their Compounds (JAMB)
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