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KCET2016ChemistryChemical Kinetics

For a chemical reaction, ( mA xB ), the rate law is ( r=k[ ~A ]² ). If the concentration of ( A ) is doubled, the reaction rate will be,

Options

  1. ADoubled
  2. BQuadrupled
  3. CIncreases by ( 8 ) times
  4. DUnchanged

Correct answer

B. Quadrupled

Step-by-step solution

For the reaction m A x B The given rate law is R=k[A]² If conc. of A is doubled, the new rate is R^ =k[2 A]²R^ =4 k [A² ] Hence, the new rate will be quadrupled to the original rate, that is, R^ =4 R

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