Post-UTME Chemistry 2006 Objective — Question 15
Question 15 of 19 from the Post-UTME Screening (Post-UTME) Chemistry 2006 Objective paper, with the correct answer and a full explanation.
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Water is poured over a white solid and a colourless neutral gas is evolved which burns with a sooty flame. The white solid is
- A. calcium
- B. calcium oxide
- C. calcium carbideCorrect
- D. sodium peroxide
Explanation
Calcium carbide reacts with water to give ethyne, which burns with a sooty flame.
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