Types of Chemical Reactions

Q2. Oxygen does not participate in combustion reactions.

Q3. A catalyst changes reaction rate without being permanently consumed.

Q4. Every chemical reaction is reversible under all conditions.

Q5. Rusting of iron is a physical change only.

Q6. Electrolysis uses electricity to cause decomposition.

Q7. Oxidation is gain of electrons.

Q8. Reduction is gain of electrons.

Q9. A reaction involving addition of oxygen can be called oxidation.

Q10. A compound breaking into two or more substances is a decomposition reaction.