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( f(x) t_{50} y=20 mathrm{min} )

# Decomposition of 3A(9) ► 2B(g) +2C(g) follows first order kinetics. Initially only A is present in the container. Pressure developed after 20 min. and infinite time are 3.5 and 4 atm respectively. Which of the following is true? A t50% = 20 min B 75% = 40 min c t999 = 64/3 min D t97.5% = 60 min

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