Which reaction is an example of a heterogeneous catalysis

A. Ethene gas reacts with hydrogen gas by using a nickel catalyst.

B. Hydrogen peroxide decomposes by using an aqueous iodide ion catalyst.

C. Formic acid decomposes by using an acidic catalyst.

D. Sulfur dioxide gas is converted to sulfur trioxide gas by using nitrogen chloride gas

the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.

there are no statements provided but here is why:

sulfur belongs to group 16 because it can be found in nature whether it is in a free or combined state.

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i think its 100.

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