Recent questions tagged Probability-mcq

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Q: A first reaction takes `40 mi n ` for `30%` decomposition. Calculate `t_(1//2)`.

A first reaction takes 40min for 30% decomposition. Calculate t1/2 . Select the correct answer from above options...

asked Jan 4, 2022 in Education by JackTerrance

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Q: The rate constant for the decomposition of hydrocarbons is `2.418xx10^(-5)s^(-1)` at `546K`. If the energy of activation is `179.9kJ mol^(-1)`, what w

The rate constant for the decomposition of hydrocarbons is 2.418 10-5s-1 at 546K . If the energy of ... pre- exponential factor? Select the correct answer from above options...

asked Jan 4, 2022 in Education by JackTerrance

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Q: Consider a certain reaction `A rarr` Products with `k=2.0xx10^(-2)s^(-1)`. Calculate the concentration of `A` remaining after `100s` if the initial co

Consider a certain reaction A→ Products with k=2.0 10-2s-1. Calculate the concentration of A remaining after 100s if ... is 1.0molL-1. Select the correct answer from above options...

asked Jan 4, 2022 in Education by JackTerrance

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Q: Sucrose decomposes in acid solution into glucose and fructose according to the first order rate law, with `t_(1//2)=3.00hr.` What fraction of sample o

Sucrose decomposes in acid solution into glucose and fructose according to the first order rate law, with t1/2=3. ... after 8hr ? Select the correct answer from above options...

asked Jan 4, 2022 in Education by JackTerrance

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Q: The decomposition of hydrocarbon follows the equation `k=(4.5xx10^(11)s^(-1))e^(-28000K//T)` Calculate `E_(a)`.

The decomposition of hydrocarbon follows the equation k=(4.5×1011s-1)e-28000K/T Calculate Ea . Select the correct answer from above options...

asked Jan 4, 2022 in Education by JackTerrance

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Q: The rate constant for the first order decompoistion of a certain reaction is described by the equation `log k (s^(-1)) = 14.34 - (1.25 xx 10^(4)K)/(T)

The rate constant for the first order decompoistion of a certain reaction is described by the equation logk(s-1)= ... periof be 256min? Select the correct answer from above options...

asked Jan 4, 2022 in Education by JackTerrance

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Q: The decomposition of `A` into product has value of `k` as `4.5xx10^(3)s^(-1)` at `10^(@)C` and energy of activation of `60kJmol^(-1)`. At what tempera

The decomposition of A into product has value of k as 4.5 103s-1 at 10∘C and energy of activation of 60kJmol-1 . At ... be 1.5 104s-1? Select the correct answer from above options...

asked Jan 4, 2022 in Education by JackTerrance

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Q: The time required for `10%` completion of a first order reaction at `298K` is equal to that required for its `25%` completion at `308K` . If the value

The time required for 10% completion of a first order reaction at 298K is equal to that required for its 25% ... 318K and Ea . Select the correct answer from above options...

asked Jan 4, 2022 in Education by JackTerrance

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Q: The rate of a reaction quadruples when the temperature changes from `293K` to `313K`. Calculate the energy of activation of the reaction assuming that

The rate of a reaction quadruples when the temperature changes from 293K to 313K . Calculate the energy of ... with temperature. Select the correct answer from above options...

asked Jan 4, 2022 in Education by JackTerrance

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Q: Why cooking food in an open vessel takes more time at a hill station ?

Why cooking food in an open vessel takes more time at a hill station ? Select the correct answer from above options...

asked Jan 4, 2022 in Education by JackTerrance