1.  1

2.  2

3.  3

4.  0

View Answer  
4
Correct Answer :

1


Explanation :
No Explanation available for this question

Rate of reaction can be expressed by Arrhenius equation as k=Ae-E/RT,in this reaction, E represents:

1.  The energy below which colliding molecules will not react

2.  The total energy of the reacting molecules at a temperature T

3.  The fraction of molecules with energy greater than the activation energy of the reaction

4.  The energy above which the colloiding molecules will react

View Answer  
4
Correct Answer :

The energy below which colliding molecules will not react


Explanation :
No Explanation available for this question

The decomposition of dimethylether leads to the formation of CH4,H2 and CO and the reaction rate is given by: rate =k[CH3OCH3]3/2The rate of reaction is followed by increase in pressure in a closed vessel and the rate can be expressed in terms of the partial pressure of dimethyl ether, i.e. rate =k(pCH3OCH3)3/2. If pressure is measured in bar and time in minutes, the units of rate constant are:

1.  bar3/2min-1

2.  bar-3/2min-1

3.  bar-1/2min-1

4.  bar-1min-1

View Answer  
4
Correct Answer :

bar-1/2min-1


Explanation :
No Explanation available for this question

For a zero order reaction; A→B,a graph of rate vs. time has slope equal to

1.  k

2.  -k/2.303

3.  -2.3030K

4.  Zero

View Answer  
4
Correct Answer :

Zero


Explanation :
No Explanation available for this question

A reaction was found to be second order with respect to the concentration of carbon monoxide. If the concentration of carbon monoxide is doubled. With everything else kept the same, the reate of reaction will

1.  Triple

2.  Increase by a factor of 4

3.  Double

4.  Remain unchanged

View Answer  
4
Correct Answer :

Increase by a factor of 4


Explanation :
No Explanation available for this question

For the reaction :2O3↔3O2 the rate of reaction is correctly given by the expression

1.  -2/3 d[O3]/dt

2.  -1/3 d[O3]/dt

3.  -1/2 d[O3]/dt

4.  1/2 d[O3]/dt

View Answer  
4
Correct Answer :

-1/2 d[O3]/dt


Explanation :
No Explanation available for this question

An exothermic reaction A→B has an activation energy of 17kJ per mole of A. The heat of reaction is 40kJ. The activation energy for the reverse reaction B→A is

1.  23 kJ

2.  97 kJ

3.  57 kJ

4.  17 kJ

View Answer  
4
Correct Answer :

57 kJ


Explanation :
No Explanation available for this question

The rate constants for forward and backward reactions of hydrolysis of ethyl acetate are 1.1x10-2 and 1.5x10-3min-1 respectively. The equilibrium constant for the reaction is :

1.  7.33

2.  0.733

3.  0.136

4.  1.36

View Answer  
4
Correct Answer :

7.33


Explanation :
No Explanation available for this question

The rate constants k1 and k2 for two different reactions are 1016. e-2000/Tand 1015. e-1000/T respectively. The temperature at which k1=k2 is:

1.  1000 K

2.  2000/2.303 K

3.  1000/2.303 K

4.  2000 K

View Answer  
4
Correct Answer :

1000/2.303 K


Explanation :
No Explanation available for this question

In a first order reaction, the concentration of the reactant decreases from 0.8 to 0.4 M in 15 minutes. The time taken for the concentration to change from 0.1 M to 0.025 M is

1.  7.5 min

2.  15 min

3.  30 min

4.  60 min

View Answer  
4
Correct Answer :

30 min


Explanation :
No Explanation available for this question
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