Chemical Kinetics Question 179

Question: A substance -A- decomposes by a first order reaction starting initially with [A] =2.00m and after 200 min [A] = 0.15m. For this reaction what is the value of k [AIIMS 2001]

Options:

A) 1.29×102min1

B) 2.29×102min1

C) 3.29×102min1

D) 4.40×102min1

Show Answer

Answer:

Correct Answer: A

Solution:

Given A = 2.00 m, t = 200 min and a(a-x) = 0.15 m we know

k=2.303tlogaax=2.303200log2.000.15

=2.303200×(0.301+0.824)=1.29×102min1



NCERT Chapter Video Solution

Dual Pane