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3. Chemical kinetics — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistry3. Chemical kinetics1 Mark
MCQ
The rate law for reaction $A + 2B = C + 2D$ will be
  • A
    Rate $ = K[A]\,[B]$
  • B
    Rate $ = K[A]\,[2B]$
  • ✓
    Rate $ = K[A]\,{[B]^2}$
  • D
    Rate $ = K\frac{{[C]{{[D]}^2}}}{{[A]{{[B]}^2}}}$
✓

Answer

Correct option: C.
Rate $ = K[A]\,{[B]^2}$
c
(c) The rate law for an reaction can be given by; rate =$K(A){(B)^2}$, i.e. the powers are raised which are given as coefficient of reactant.

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