A catalyst accelerates the reaction, bec...

A catalyst accelerates the reaction, because

it brings the reactants closer

it lowers the activation energy

it changes the heat of reaction

it increases the activation energy

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A catalyst increase the rate of reaction because it

A catalyst alters the rate of a reaction by leading of increasing the energy of activation, In Heterogeneus catalysis adrosption mechanism occurs and Hemogeneus. Catalysis intermediate formation occurs. In auto catalysis one of the products acts on catalyst. The DeltaH of a reaction A + B to C is d -20 KJ mol^(-1) . When a catalyst is used. What is DeltaH for the reaction without catalyst (magnitude)

A catalyst increases the rate of a reaction with out changing ______

(A) Presence of catalyst increases the rate of reaction (R ) Presence of catalyst increases the enthalpy of reaction

Assertiojn (A):A catalyst increases that rate of a reaction . ReasonR): In the presence of a catalyst,the activation energy of the reaction increases.

A: A catalyst increases the rate of a reaction. R: In presence of a catalyst, the activation energy of the reaction increases.

(A) Rate of reaction can also increase with the formation of product, if one of the products acts as a catalyst. (R ) A catalyst lowers the activation energy of the reaction

What is the role played by catalyst to alter the rate of reaction? Explain diagramatically.

AAKASH SERIES-CHEMICAL KINETICS-Objective Exercise - 4 (Assertion (A) & Reason (R) Type Questions)

A catalyst accelerates the reaction, because
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(A) Spontaneous reaction may be slow or fast. (R ) Spontaneous natur...
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A: Rate of reaction increases with increasse in concentration of react...
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A: Hydrolysis of an ester is a slow reaction R: Reactions between co...
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(A) All collisions lead to chemical reaction (R ) All molecules brin...
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A: Order of reaction is evaluated from the mechanism of a reaction ...
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A: A catalyst increases the rate of a reaction. R: In presence of a ...
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(A) The rate of the reaction is the rate of change of concentration of...
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(A ) If in a zero order reaction, the concentration of the reactant is...
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(A) The addition of catalyst lowers the activation barrier, yet there ...
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(A) In a multiple reaction, the rate determining step is the fast step...
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(A) Half-life period of a reaction of first order is independent of in...
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(A) Order of recation is related to molecularity of reaction (R ) Mo...
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(A) The rate law equation can be found only by experiment. (R ) Rate...
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(A) Reactions of higher order are rare (R ) The chances of multimole...
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(A) Rate of reaction increases with increase in temperature. (R ) Nu...
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(A) The mass of the products formed in a reaction depends upon the lim...
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(A) Order with respect to any reactant or product can be zero or posit...
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(A) The rections 2NO+O(2) to 2NO(2) and 2CO+O(2) to 2CO(2), proceed at...
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(A) Hydrolysis of ethyl acetate in presence of acid is a reaction of f...
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(A) The rate of reaction is always negative. (R ) Minus sign used in...
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