Question

Which of these changes does a burning matchstick undergo?
(i) Endothermic reaction
(ii) Exothermic reaction
(iii) Chemical change

• A. Only (i) and (ii)
• B. Only (ii) and (iii)
• C. Only (i) and (iii)
• D. (i), (ii) and (iii)

Answer 1

The correct option is B Only (ii) and (iii)

When a match stick is rubbed, friction raises the temperature above the ignition temperature, leading to the combustion of chemical at the tip of matchstick. Since combustion is a chemical reaction involving reaction with oxygen forming new products, burning of matchstick is a chemical change.