NEET 2026
- Exam
- NEET
- Year
- 2026
- Subject
- Chemistry
- Chapter
- Chapter
NEET 2026 · Chemistry · Chapter
The given plot shows the variation of k versus (1)/(T) for two...
The given plot shows the variation of versus for two different chemical reactions, Reaction 1 and Reaction 2.
Based on the graph, which of the following relations is correct regarding their activation energies () and pre-exponential factors ()?
Options
- A and
- B and
- C and
- D and
Correct answer
B. and
Step-by-step solution
According to the Arrhenius equation:
Taking the natural logarithm on both sides, we get:
This represents a straight line equation , where and .
The slope of the line is and the y-intercept is .
From the given graph, both Reaction 1 and Reaction 2 have the same y-intercept. Therefore:
The graph also shows that the line for Reaction 1 is steeper (has a more negative slope) than the line for Reaction 2. Let and be their respective slopes.
Multiplying by (which reverses the inequality):
Thus, and .
Answer: and
Taking the natural logarithm on both sides, we get:
This represents a straight line equation , where and .
The slope of the line is and the y-intercept is .
From the given graph, both Reaction 1 and Reaction 2 have the same y-intercept. Therefore:
The graph also shows that the line for Reaction 1 is steeper (has a more negative slope) than the line for Reaction 2. Let and be their respective slopes.
Multiplying by (which reverses the inequality):
Thus, and .
Answer: and