Q25. For the reaction, R→ P, the log ([R]t/[R]0) verses time (t) plot is given below. What is the or

Q: What is the correct answer for CUET UG Chemistry Q25?

The correct answer is B. For a first-order reaction, the integrated rate law can be written as:ln([R]0/[R]t) = ktConverting to base-10 logarithm:2.303 log([R]0/[R]t) = ktlog([R]0/[R]t) = (k/2.303)tThe plot of log([R]0/[R]t) vs time (t) is a straight line with a positive slope equal to k/2.303. The question shows 'log([R]t/[R]0)' on the y-axis with a positive slope, and explicitly labels the slope as k/2.303. If it's log([

Q: Q25. For the reaction, R→ P, the log ([R]t/[R]0) verses time (t) plot is given below. What is the order of reaction and what are the units of rate constant? (a) Zero order, s-1 (b) First order,…

The correct answer is B. For a first-order reaction, the integrated rate law can be written as:ln([R]0/[R]t) = ktConverting to base-10 logarithm:2.303 log([R]0/[R]t) = ktlog([R]0/[R]t) = (k/2.303)tThe plot of log([R]0/[R]t) vs time (t) is a straight line with a positive slope equal to k/2.303. The question shows 'log([R]t/[R]0)' on the y-axis with a positive slope, and explicitly labels the slope as k/2.303. If it's log([

Q: What are the options for this CUET UG Chemistry question?

A. (a) Zero order, s-1 · B. (b) First order, s-1 · C. (c) Second order, mol-1 L s-1 · D. (d) Zero order, mol L-1 s-1

Question

Q25. For the reaction, R→ P, the log ([R]t/[R]0) verses time (t) plot is given below. What is the order of reaction and what are the units of rate constant?
(a) Zero order, s-1
(b) First order, s-1
(c) Second order, mol-1 L s-1
(d) Zero order, mol L-1 s-1

FirstInTest · Accepted Answer

For a first-order reaction, the integrated rate law can be written as:ln([R]0/[R]t) = ktConverting to base-10 logarithm:2.303 log([R]0/[R]t) = ktlog([R]0/[R]t) = (k/2.303)tThe plot of log([R]0/[R]t) vs time (t) is a straight line with a positive slope equal to k/2.303. The question shows 'log([R]t/[R]0)' on the y-axis with a positive slope, and explicitly labels the slope as k/2.303. If it's log([R]t/[R]0), then it would be -k/2.303. Assuming the visual representation and the slope formula for k/2.303, it strongly implies a first-order reaction with a slope derived from log([R]0/[R]t).The units of the rate constant for a first-order reaction are s⁻¹ (or time⁻¹).

Answer

(a) Zero order, s-1

Answer

(b) First order, s-1

Answer

(c) Second order, mol-1 L s-1

Answer

(d) Zero order, mol L-1 s-1

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