AP EAMCET202418 May 2024Morning ShiftChemistryChemical KineticsActual
At 298 K . for a first order reaction ( A P ) the following graph is obtained. The rate constant (in s ⁻¹ ) and initial concentration (in mol L ⁻¹ ) of ' A ' are respectively (y -axis = ( a - x ) ; x -axis = time in sec )
Options
- A2.303 ; 10⁻¹
- B10⁻² ; 2.303
- C10⁻¹ ; 10⁻²
- D10⁻² ; 10⁻¹
Correct answer
D. 10⁻² ; 10⁻¹
Step-by-step solution
From first order reaction, aligned & a a-x =K t & a- (a-x)=K t aligned aligned & (a-x)= a-K t & y=c+m x aligned aligned & c ( intercept )= a & m ( slope )=- K & given, aligned c = a or, a =-2.303 aligned & 2.303 a=-2.303 & a=-1 & a=10⁻¹ aligned again, gathered - K =-(10)⁻² ~K =10⁻² gathered