JEE Main20257 Apr 2025Morning ShiftChemistryChemical KineticsActual
Reaction A ( g ) 2 ~B ( ~g )+ C ( g ) is a first order reaction. It was started with pure A Which of the following option is incorrect ?
Options
- AInitial pressure of A is 80 mm Hg
- BThe reaction never goes to completion
- CRate constant of the reaction is 1.693 ~min ⁻¹
- DPartial pressure of A after 10 minute is 40 mm Hg
Correct answer
C. Rate constant of the reaction is 1.693 ~min ⁻¹
Step-by-step solution
A ( g ) 2 ~B ( ~g )+ C ( g ) array llll t =0 & P ₀ & & t & 0 & 2 P ₀ & P ₀ array aligned P _ =3 P ₀ & =240 P ₀ & =80 ~mm of Hg aligned Kt = ( P _ - P ₀ P _ - Pt ) K 10= ( 240-80 240-160 ) K = n 2 10 =0.0693 ~min ⁻¹ Option (3) is incorrect