railway DFCCIL Junior Executive 2023 (CBT 1 & CBT 2) Mock Test General Science Chemistry Basic Concepts of Chemistry
Which of the given statements about chemical change is correct?
1. One or more new substances are formed in a chemical change.
2. Photosynthesis in plants is an example of chemical change.
1
1 only
2
2 only
3
Both 1 and 2
4
Neither 1 nor 2