Post-UTME Chemistry 2019 Objective — Question 6
Question 6 of 20 from the Post-UTME Screening (Post-UTME) Chemistry 2019 Objective paper, with the correct answer and a full explanation.
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A metal, X does not react with cold water but reacts with steam. In which of the following is X correctly placed in order of decreasing activity?
- A. Potassium, X, calcium, copper, silver
- B. Potassium, Calcium, X, copper and silverCorrect
- C. Potassium, calcium, copper, silver, X
- D. Potassium, calcium, copper, X, silver
Explanation
A metal reacting with steam but not cold water is less reactive than calcium (which reacts with cold water) but more reactive than copper/silver (which don't react with steam), placing X between calcium and copper.
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