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Write the difference between order and molecularity of reaction.

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2 Answers

Order  Molecularity 
1. It is the sum of the powers of concentration terms in the rate law expression.
 2. It is determined experimentally.
3. Order of reaction need not to be a whole num ber.
4. Order of reaction can be zero.		 It is the number of reacting species undergoing simultaneously collision in a reaction.
 2. It is a theoretical concept.
 3. It is whole number only.
 4. It canít be zero or fractional.

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ORDER  MOLECULARITY
It is the sum of the powers of concentration terms in the rate law expression. It is the number of reacting species undergoing simultaneously Collision in a reaction.
It is determined experimentally.  it is a theoretical concept.
Order of reaction need not be a whole number.  It is whole no. only.
Order of reaction can be zero.  It can’t be zero or fractional. 

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