railway DFCCIL Junior Executive 2023 (CBT 1 & CBT 2) Mock Test General Science Chemistry Chemical Reaction
Which of the following is/are not an example of a chemical change ?
(A) Digestion of food in our body
(B) Fermentation
(C) Photosynthesis
(D) Crystallisation
1
Only (C)
2
(B) and (D)
3
(A) and (D)
4
Only (D)