The following mechanism has been proposed for the reaction of NO with Br2 to form NOBr: NO(g)+Br2(g)↔NO Br2(g),NO Br2(g)+No(g)↔2 NOBr(g) If the second step is rate determining step, the order of the reaction with respect to NO(g) is

1.  0

2.  3

3.  2

4.  1

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4
Correct Answer :

2


Explanation :
No Explanation available for this question

The oxidation of oxalic acid by acidified KMnO4 is an example of autocatalysis. It is due to which of the following

1.  SO42-

2.  MnO42-

3.  Mn2+

4.  K+

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4
Correct Answer :

Mn2+


Explanation :
No Explanation available for this question

1.  2k1[NO2] - k2[N2O4]

2.  2(k1[NO2]2 - k2[N2O4])

3.  (2k1- k2) [NO2]

4.  (2k1/ k2) [NO2]

View Answer  
4
Correct Answer :

2(k1[NO2]2 - k2[N2O4])


Explanation :
No Explanation available for this question

Two reaction proceed at 250C at the same rate. The temperature coefficient of the rate of first reaction is 2 and that of second reaction is 2.5. The ratio of rates of these reactions at 950C is

1.  5.6

2.  9.85

3.  4.768

4.  70

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4
Correct Answer :

4.768


Explanation :
No Explanation available for this question

A reaction involving the different reactants can never be

1.  Unimolecular reaction

2.  First order reaction

3.  Second order reaction

4.  Bimolecular reaction

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4
Correct Answer :

Unimolecular reaction


Explanation :
No Explanation available for this question

A first order reaction is 25% complete in one hour. At the end of two hours, the extent of reaction is

1.  50%

2.  31.25%

3.  43.75%

4.  75%

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4
Correct Answer :

43.75\%


Explanation :
No Explanation available for this question

For reaction A+B↔C+D, doubling the concentration of both the reactants increases the reaction rate by 8 times and doubling initial concentration of only B simply doubles the reaction rate. The rate law is given as

1.  r=k[A][B]

2.  r=k[A]2[B]

3.  r=k[A][B]2

4.  r=k[A]1/2[B] 1/2

View Answer  
4
Correct Answer :

r=k[A]2[B]


Explanation :
No Explanation available for this question

The rate of reaction depends on all factors except

1.  Reaction temperature

2.  Concentration of reactants

3.  Magnitude of equilibrium constant

4.  Specific rate constant

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4
Correct Answer :

Magnitude of equilibrium constant


Explanation :
No Explanation available for this question

The free energy change in a photochemical reaction is

1.  Always zero

2.  Always negative

3.  Always positive

4.  May be negative or positive

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4
Correct Answer :

May be negative or positive


Explanation :
No Explanation available for this question

A reaction A+B→C is second order with respect to A and independent of B. The rate expression for the reaction is

1.  Rate =k[A][B]

2.  Rate =k[A]2[B]

3.  Rate =k[A]2[B]2

4.  Rate =k[A]2

View Answer  
4
Correct Answer :

Rate =k[A]2


Explanation :
No Explanation available for this question
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