Advertisements
Advertisements
Question
Which of the following are chemical changes?
(i) Decaying of wood
(ii) Burning of wood
(iii) Sawing of wood
(iv) Hammering of a nail into a piece of wood
Options
(i) and (ii)
(ii) and (iii)
(iii) and (iv)
(i) and (iv)
Advertisements
Solution
(i) and (ii)
Explanation:
Decaying of wood and burning of wood are chemical changes since there is a change in the chemical composition of wood. Sawing of wood and hammering of a nail into a piece of wood are physical changes since there is no change in the composition of the wood during these changes.
APPEARS IN
RELATED QUESTIONS
Complete and balance the following chemical equations
NaCI + `AgNO_3` `→`
Define precipitation reaction.
TRUE \ FALSE
Ammonia is a good oxidizing agent.
State four conditions necessary for a chemical reaction to take place.
Name: A greenish-yellow gas.
Name the following:
The products obtained during ‘photosynthesis’ – which is a chemical change.
The chemical change is ______.
Write some materials prepared by chemical changes.
Write the characteristics of chemical change.
Define the following term:
Chemical change
