How catalyst increases rate of a reactio...

How catalyst increases rate of a reaction.

Text Solution

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Catalyst provides an alternate pathway by reducing the activation energy and lowering the energy barrier. More molecules enters the threshold energy state leading to chemical reaction and hence increases the rate.

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Explain the influence of a catalyst on rate of reaction.

Which one is the correct factor that explains the increase of rate of reaction by a catalyst

Knowledge Check

When a catalyst increase the rate of a chemical reaction, the rate constant

A

remains constant

B

increases

C

decreases

D

may increase or decrease and depending on the order of a reaction

The rate law experession for four reactions are give below . In which case the percentage increase in the rate of reaction would be maximum when the concentration of A is doubled ?

A

rate = k[A]

B

rate `= k[A]^(3//2)`

C

rate `k[A]^(@)`

D

rate =` k[A]^(2)`

The rate of a chemical reaction doubles for every 10^@ rise in temperature. If the temperature increases by 60^@ the rate of reaction increases

A

20 times

B

32 times

C

64 times

D

128 times

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[A]: Plants hormones are called phytohormones [R]: They increase rate of reaction & accelerate growth.

Name the catalyst used in Friedel -craft reaction.

For the reaction A + B rarr P , the rate is given by Rate = K [A]^(1) [B]^(2) . By how many times does the rate of reaction increase when concentrations of A & B are doubled?

What is the effect of a catalyst on DeltaG of a reaction?

How many times rate of reaction increases when temperature is incereased from - 4.2""^(@)C to 25.8""^(@)C .

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