If the rate of a chemical reaction is expressed in the following manner : Rate = K[A]2[B], then the order of this reaction would be–
(A) 2
(B) 3
(C) 1
(D) 0
1 Answers
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At 407 K, the rate contant of a chemical reaction is `9.5xx10^(-5) s^(-1)` and at 420 K the rate constant is `1.9xx10^(-4)s^(-1)`. Calculate the frequ
`"log"_(10) =(E_(2))/(2.303xxR)[(T_(2)-T_(1))/(T_(1)T_(2))]` Given `k_(1)=9.5xx10^(-5)s^(-1),k_(2)=1.9xx10^(-4)s^(-1),` R=8.314J `"mol"^(-1)K^(-1),` `T_(1)-407 K and T_(2)=420K` Substituting the values in Arrhenius equation `"log"_(10)(1.9xx10^(-4))/(9.5xx10^(-5))=(E_(a))/(2.303xx8.314)[(420-407)/(420xx407)]` Applying now log `k_(1)` = log `A-(E_(a))/(2.3030RT_(1))` log `9.5xx10^(-5)="log"A-(75782.3)/(2.303xx8.314xx407)` or log `(A)/(9.5xx10 ^(-5))=(757.82.3)/(2.3030xx8.314xx407)=9.7246` `A=5.04xx10^(5)s^(-1)`
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Rate constant of a reaction `(k)` is `175 "litre"^(2) "mol"^(-2)sec^(-1)`. What is the order of reaction ?
Unit of `[("litre")/("mol")]^(n-1)xxsec^(-1)" "....(i)` Given unit of k = `"litre"^(2)"mol"^(-1)"sec"^(-1)" "....(ii)` n-1=2 n=3
2 Answers 1 views
The rate constant of a reaction is found to be `3xx10^(-3)"mol"L^(-1)"min"^(-1)`. The order of the reaction is :
Correct Answer - A Unit of rate and rrte constant are same for zero order reaction.
2 Answers 1 views
The rate constant of a first order reaction at `27^(@)C "is" 10^(-3)"min"^(-1)`.The constant ( in `"min"^(-1)`) at `17^(@)C` for this reaction ?
Correct Answer - B `(k_(T_(2)))/(k_(T_(1)))=(mu)^(DeltaT//10)` `(10^(-3))/(k_(T_(1)))=(mu)^(10//10)=2` `k_(T_(1))=(10^(-3))/(2)=0.5xx10^(-3)=5xx10^(-4)"min"^(-1)`
2 Answers 1 views
The reaction `Aoverset(k)rarr` Product, is zero order while the reaction `Boverset(k)rarr` Product, is first order reaction. For what intial concentra
Correct Answer - A For zero order reaction, x=kt `:. (a)/(2)=kxxt_(1//2),i.e.,t_(1//2)=(a)/(2k)" ".....(i)` For frist order reaction, `t_(1//2)=(log_(e)2)/(k)" ".....(ii)` From eqs. (i) and (ii), `(a)/(2k)=(log_(e)2)/(k)` `a=log_(e)4M`
2 Answers 1 views
In which chemical reaction does carbon exibit variation of oxidation state from -4 to +4 ? Write balanced chemical reaction.
In combustion of methane, Carbon exhibits variation from -4 to +4. The reaction is as follows : CH4 + 2O2 → CO2 + 2H2O In CH4, The oxidation state of carbon is -4 while in...
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The rate of a reaction depends upon the temperature and is quantitatively expressed as `k=Ae^((-Ea)/(RT)` i) If a graph is plotted between log k and 1
(i) `"Slope"=-(E_(a))/(2.303R)` (ii) `k_(1)ltk_(2)`
2 Answers 2 views
(a) For a reaction `ABrarrP` , the rate law is given by, `r=k[A]^(1//2)[B]^(2).` What is the order of this reaction? (b) A first order reaction is fou
(a) `0.5+2=2.5` (b) For the first order reaction, `t_(1//2)=(0.693)/(K)=(0.693)/(5.5xx10^(-14)S^(-1))=1.26xx10^(13)S.`
2 Answers 1 views
1. Concepts related to population growth Birth rate, Death rate, Survival rate, Interest rate.
1. Interest rate 2. Expansion of industrial sector
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A ball is projected in a manner such that its horizontal gange is n times of the maximum height. Then find out the ratio of potential energy to kineti
Correct Answer - `(16)/(n^(2))`
2 Answers 3 views