which pair of substances would most likely result in the production of a gas when reacting with an acid?\n…

which pair of substances would most likely result in the production of a gas when reacting with an acid?\n- litmus and methyl orange\n- base and salt\n- metal and carbonate\n- carbon dioxide and water

which pair of substances would most likely result in the production of a gas when reacting with an acid?\n- litmus and methyl orange\n- base and salt\n- metal and carbonate\n- carbon dioxide and water

Answer

Brief Explanations:

Litmus and methyl orange are indicators, not substances that produce gas with acid. A base - acid reaction may not always produce gas, and a salt - acid reaction doesn't typically produce gas in most common cases. Carbon dioxide and water don't react with acid to produce gas. Metals react with acids to produce hydrogen gas (e.g., Zn + 2HCl = ZnCl₂ + H₂↑), and carbonates react with acids to produce carbon dioxide gas (e.g., CaCO₃ + 2HCl = CaCl₂+ H₂O + CO₂↑).

Answer:

C. metal and carbonate