You suspect one of the products of a single replacement is hydrogen gas. How might you experimentally confirm your prediction? Choose the best option.
a. Watch for bubbles to form in solution which indicates a gas was produced. b. Waft to detect an odor from the test tube.
c. Place a burning splint near the end of the test tube and listen for a 'pop' sound. d. Hydrogen gas is never a product in a chemical reaction.
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