question_answer 61)

  Which of the following statements are applicable to a balanced chemical equation of an elementary reaction? (a) Order is same as molecularity       (b) Order is less than the molecularity (c) Order is greater than the molecularity (d) Molecularity can never be zero

Answer:

                  (a, d) For a balanced chemical equation of an elementary reaction order is same as molecularity and molecularity can never be zero. If molecularity of a reaction is considered to be zero it mean that no reactant is going to transform into product. Consider a chemical reaction. Differential rate law expression can be written as Here, molecularity = 3, order = 3