The rate Constant of reaction A  B is 0.6 X 10-3 mole per second. If the Concentration of A is 5, then the concentration of B after 20 min is:

1. 1.08M

2. 3.60M

3. 0.36M

4. 0.72M

Subtopic:  Order,Molecularity and Mechanism |
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The activation energy of a reaction can be determined from the slope of which of the following graphs?
1. ln K vs T
2. ln KTvs T
3. ln K vs IT
4. ln TK vs IT

Subtopic:  Arrhenius Equation |
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When the initial concentration of a reactant is doubled in a reaction, its half-life period is not affected. The order of the reaction will be:

1. 0

2. 1

3. 1.5

4. 2

Subtopic:  Order,Molecularity and Mechanism |
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What is the activation energy for a reaction if its rate doubles when the temperature is raised from 20oC to 35oC? (R = 8.314 J mol–1 K–1)
1. 269 kJ mol–1
2. 34.7 kJ mol–1
3. 15.1 kJ mol–1
4. 342 kJ mol–1

 

Subtopic:  Arrhenius Equation |
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A reaction having equal energies of activation for forward and reverse reaction has:

1. ΔG = 0

2. ΔH = 0

3. ΔH = ΔG = ΔS = 0

4. ΔS = 0

Subtopic:  Arrhenius Equation |
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In a reaction, A + B Product, rate is doubled when the concentration of B is doubled, and rate increases by a factor of 8 when the concentrations of both the reactants (A and B) are doubled. Rate law for the reaction can be written as

1. Rate =k[A][B]2

2. Rate =k[A]2[B]2

3. Rate =k[A][B]

4. Rate =k[A]2[B]

Subtopic:  Definition, Rate Constant, Rate Law |
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In a zero order reaction for every 10 ° rise of temperature, the rate is doubled. If the temperature is increased from 10 °C to 100 °C, the rate of the reaction will become

1. 256 times

2. 512 times

3. 64 times

4. 128 times

Subtopic:  First Order Reaction Kinetics |
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Activation energy Ea and rate constant (k1 and k2) of a chemical reaction at two different temperatures (T1 and T2) are related by -

1. ln k2k1=-EaR(1T2-1T1) 

2. In k2k1=-EaR(1T2+1T1) 

3. In k2k1=EaR(1T2-1T1) 

4. In k2k1=-EaR(1T1-1T2) 

Subtopic:  Arrhenius Equation |
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The incorrect statement regarding the order of reaction is:

1.  Order is not influenced by the stoichiometric coefficient of the reactants. 

2.  Order of reaction is the sum of power to the concentration terms of reactants to express the rate of reaction. 

3. The order of reaction is always a whole number.

4.  Order can be determined by experiments only. 

Subtopic:  Definition, Rate Constant, Rate Law |
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The unit of rate constant for a zero-order reaction is -

1. s-1

2. mol L-1s-1

3. L mol-1s-1

4. L2mol-2s-1

Subtopic:  Definition, Rate Constant, Rate Law |
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