NEET Chemistry Chemical Kinetics Questions Solved


The t0.5 for the first order reaction.

PCl5(g) PCl3(g) + Cl2(g) is 20 min. The time in which the conc. of PClreduces to 25% of the initial conc. is close to 

1. 22 min

2. 40 min

3. 90 min

4. 50 min

(2) K = (2.303/t)log100/25

     2.303x0.301/20 = 2.303/tx2x0.301

     t = 40 min

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