Q. A first order reaction is 10% complete in 20 min. The time taken for 19% completion is
A) 30 min
B) 40 Min
C) 50 min
D) 38 min
Explanation
(b)
10% of the reaction is completed in 20min .Next 20% of the reaction will be completed in next 20min. Hence, 10%+9%=19% of the reaction will be completed in 20+20=40min.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.