The
figure shows which of the following hazard?
a) explosion
b) dangerous for the environment
c) highly flammable
d) harmful
Exercise
Which of the
following is an example of physical change?
a) mixing baking soda and vinegar
b) chopping of log
c) burning a paper with a lighter
d) baking a birthday cake for your mother
Which of the following is an example of chemical change?
a) filling up a balloon with air
b) freezing of water
c) photosynthesis
d) boiling of water
Which change can easily reverse?
a) chemical change
b) physical change
c) both chemical and physical changes
d) neither chemical nor physical change
When a new substance is formed with properties different from the ones it was formed
a) chemical change
b) physical change
c) freezing
d) boiling
