Question

what is velocity?
What is speed?
What is combination reaction?
What is displacement reaction? ​

Answer 1

• The velocity of an object is the rate of change of its position with respect to a frame of reference, and is a function of time.

• The speed of an object is the magnitude of its velocity .

OR

the rate of change of its position.

• A combination reaction is when two elements react with each other to form a larger compound.

• In this type of reaction the more reactive element displaces the less reactive one from its salt solution.

Answer 2

Velocity is total displacement decided by total time taken.

Speed is total distance traveled upon total time taken.

When reactants combine it is termed as combination reaction.

When a more reactive element displaced a less reactive element, it is called as displacement reaction.