CBSE Class 10 Chemistry Chemical Reactions


Breaking of glass is

a. Reversible change 

b. Irreversible change

c. Physical change

d. Chemical change


Which of the following does not show both physical and chemical changes? 


Which does not occur when we add zinc to dilute HCl?

a) Absorption of heat  

b) Evolution of heat

c) Evolution of hydrogen

d) Change in colour


On covering the mouth with the hands, the hands feel warm because respiration is 

Chemical Reactions - Exam Decoded

This video contains questions on the features of chemical reactions, endothermic reactions, exothermic reactions and precipitation reactions.