A reaction whose products are always carbon dioxide and water . A reaction in which one substance becomes two . Which of these indicate a chemical reaction is taking place . A chemical reaction in which elements are joined to form a compound . Which type of reaction occurs when sulfuric acid and sodium hydroxide combine .
Zinc reacts with hydrochloric acid.
Which gas is produced . A. hydrogen B. chlorine C. oxygen D. none of these Write the reaction type in the blank beside each of the following equations.