Advertisements
Advertisements
प्रश्न
The slope in the plot of `log ["R"]_0/(["R"])` Vs. time for a first-order reaction is ______.
पर्याय
`(+"k")/2.303`
+k
`(-"k")/2.303`
−k
Advertisements
उत्तर
The slope in the plot of `log ["R"]_0/(["R"])` Vs. time for a first-order reaction is `bbunderline((+"k")/2.303)`.
Explanation:
For the reaction, \[\ce{R -> Products}\]
The integrated first-order rate equation is
log [R] = `(−"kt")/2.303 + log ["R"_0]`
or `log (["R"_0])/(["R"]) = ("kt")/2.303`
Comparing the above equation with a straight-line equation y = mx + c
∴ y = `log (["R"_0])/(["R"])`, x = t, slope = `"k"/2.303`
APPEARS IN
संबंधित प्रश्न
A first order reaction has a rate constant 1.15 × 10−3 s−1. How long will 5 g of this reactant take to reduce to 3 g?
In a pseudo first order reaction in water, the following results were obtained:
| t/s | 0 | 30 | 60 | 90 |
| [A]/mol L−1 | 0.55 | 0.31 | 0.17 | 0.085 |
Calculate the average rate of reaction between the time interval 30 to 60 seconds.
A first order reaction takes 20 minutes for 25% decomposition. Calculate the time when 75% of the reaction will be completed.
(Given : log = 2 = 0·3010, log 3 = 0·4771, log 4 = 0·6021)
Define order of reaction. How does order of a reaction differ from molecularity for a complex reaction?
Show that the time required for 99.9% completion of a first-order reaction is three times the time required for 90% completion.
In the presence of acid, the initial concentration of cane sugar was reduced from 0.2 M to 0.1 Min 5 hours and to 0.05 Min 10 hours. The reaction must be of?
The reaction X → product
Follow first order of kinetics. In 40 minutes the concentration of 'X' changes from 0.1 m to 0.025. M. The rate of reaction when concentration of X is 0.01 m is.
A definite volume of H2O2 undergoing spontaneous decomposition required 22.8 c.c. of standard permanganate solution for titration. After 10 and 20 minutes respectively the volumes of permanganate required were 13.8 and 8.25 c.c. The time required for the decomposition to be half completed is ______ min.
Radioactive decay follows first-order kinetics. The initial amount of two radioactive elements X and Y is 1 gm each. What will be the ratio of X and Y after two days if their half-lives are 12 hours and 16 hours respectively?
Define first-order reaction.
