NTA Abhyas NEET2020ChemistryChemical KineticsPractice
Benzene diazonium chloride in aqueous solution decomposes as : C 6 H 5 - N = N + Cl aq - + H 2 O aq ⟶ C 6 H 5 OH aq + N 2 g + HCl (aq) The reaction follows first order kinetics. If p t is the pressure of N 2 at constant volume and temperature corresponding to different intervals of time t and p f that after completion of the reaction, then which of the following graphs conforms to the kinetics of the reaction ?
Correct answer
2
Step-by-step solution
p f ∝ Initial moles of C 6 H 5 N 2 + Cl - a p t ∝ Moles of N 2 evolved at time t ∝ Moles of C 6 H 5 N 2 + Cl - reacted p f - p t ∝ mole of C 6 H 5 N 2 + Cl - left at time t (a - x) kt = 2 . 3 0 3 log a a - x k t= 2 . 3 0 3 log p f p f - p t k t 2.303 = log P f − log P f − P t log p f - p t = log p f - k 2 . 3 0 3 t Interception y axis = log p f Slope = - k 2 . 3 0 3