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QAIPMT-2007-Ch-2328: NEET 2007 Chemistry - Class 12 AIPMT-2007-Ch-2328 Solution: If 60% of a first order reaction was completed in 60 minutes,…
If 60% of a first order reaction was completed in 60 minutes, 50% of the same reaction would be completed in approximately (log 4 = 0.60, log 5 = 0.69)
Multiple Choice Options
- A 45 minutes
- B 60 minutes
- C 40 minutes
- D 50 minutes
Step-by-Step Verified Solution
For a first order reaction,
k = 2.303 t log _ a a _ x
k = 2.303 60 log _ 100 40
= 2.303 60 log _ 2.5
= 0.0153
Also, t 1 / 2 = 2.303 k log _ 100 50
= 2.303 0.0153 log _ 2
= 45 min.