Question

For a chemical reaction to occur, all of the following must happen except.

• A. A large enough number of collisions must occur
• B. Chemical bonds in the reactants must break
• C. Reactant particles must collide which enough energy for change to occur
• D. Reactant particles must collide with correct orientation

Answer 1

Answer: (A)

A large enough number of collisions must occur

For a chemical reaction to occur, bonds must break in reactant so that new bonds are formed. Moreover, reactants must collide with energy greater than activation energy for change to ocur.

Also, reactant must have proper orientation for reaction.

However, it is not necessary that enough number of collisions must occur.