The rate of a reaction doubles when its temperature changes from 300 K to 310 K. The activation energy of such a reaction will be:

 \((R=8.314 \mathrm{~J} \mathrm{~K}^{-1} \mathrm{~mol}^{-1} \text { and } \log 2=0.301)\)

1. \(53.6 \mathrm{~kJ} \mathrm{~mol}^{-1} \) 2. \(68.6 \mathrm{~kJ} \mathrm{~mol}^{-1} \)
3. \(59.5 \mathrm{~kJ} \mathrm{~mol}^{-1} \) 4. \(70.5 \mathrm{~kJ} \mathrm{~mol}^{-1}\)

Subtopic:  Arrhenius Equation |
 70%
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Which is mismatched?

1. 

2. 

3. 

4. 

Subtopic:  Order, Molecularity and Mechanism |
 61%
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If a reaction A + B → C is exothermic to the extent of 30 kJ mol−1 and the forward reaction has an activation energy of 249 kJ mol−1, the activation energy for the reverse reaction in kJ mol-1 will be:

1. 324 2. 279
3. 40 4. 100
Subtopic:  Arrhenius Equation |
 93%
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Select the correct option based on statements below:

Assertion (A): For elementary reactions, the law of mass action and the rate of law expression are generally the same.
Reason (R): The molecularity of an elementary reaction is always one.
 
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Subtopic:  Order, Molecularity and Mechanism |
 64%
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Select the correct option based on statements below:

Assertion (A): At very high temperatures (approaches to infinity), the rate constant becomes equal to the collision frequency.
Reason (R): The collision in which molecules collide with proper orientation is called an ineffective collision.
 
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Subtopic:  Arrhenius Equation |
 71%
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Select the correct option based on statements below:

Assertion (A): Base catalyzed hydrolysis of ethyl acetate is a first-order reversible reaction.
Reason (R): The order of reaction always depends on the stoichiometry of the reaction.
 
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Subtopic:  Order, Molecularity and Mechanism |
 52%
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Select the correct option based on statements below:

Assertion (A): The overall order of reaction is the sum of the power of all the reactants in the rate expression.
Reason (R): There are many higher-order reactions.
 
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Subtopic:  Order, Molecularity and Mechanism |
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For a reaction, activation energy Ea=0 and the rate constant at 200 K is    1.6 X 106s-1. The rate constant at 400K will be [Given that gas constant, R=8.314 J K-1 mol-1]

1.  3. 2 x 104 s-1
2. 1.6 x 106s-1

3. 1.6 x103 s-1

4. 3.2 x 106 s-1

Subtopic:  Arrhenius Equation |
 76%
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NEET - 2019
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A first-order reaction has a rate constant of 2.303×10-3 s-1. The time required for 40 g of this reactant to reduce to 10 g will be [Given that log102=0.3010]

1. 230.3 s

2. 301 s

3. 2000 s

4. 602 s

Subtopic:  First Order Reaction Kinetics |
 83%
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NEET - 2019
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Zieglar-Natta catalyst is

1.  K[PtCl3(C2H4)]

2.  (Ph3P)3RhCl

3.  Al2(C2H5)6+TiCl4

4.  Fe(C5H5)2

Subtopic:  Catalyst |
 77%
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