NEET Chemistry Chemical Kinetics Questions Solved


Thermal decomposition of a compound is of first order . If 50 % of a sample of the compound is decomposed in 120 minutes , show how long will it take for 90 % of the compound to decompose

(A) 399 min                                                        

(B) 410 min

(C) 250 min                                                        

(D) 120 min

(A) K=0.6932120                                                 ....1K=2.303tloga0.10a=2.303tlog10      ......2Equating 1 and 20.6932120=2.303tt=399 minutes

Difficulty Level:

  • 34%
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  • 24%
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