Answer:
D
Explanation:
This is because, of chemical reaction
Answer:
C.
Explanation:
Iron is most likely to form a precipitation reaction.
Answer:
A: 20 km/h, B: 10 km/h
Explanation:
Speed of Vehicle A = 40-20/ 2-1
=20 km/h
If A is 20km/h, B is 10km/h as given in option