From the following data , the orders with respect to A, B, C , respectively, are :

[A] (mol/L)  [B] (mol/L) [C] (mol/L) rate (M/sec.)
0.2 0.1 0.02 8.08 x 10-3
0.1 0.2 0.02 2.01 x 10-3
0.1 1.8 0.18 6.03 x 10-3
0.2 0.1 0.08 6.464 x 10-2


1. -1, 1, 3/2                                     

2. -1, 1, 1/2

3. 1, 3/2,-1                                     

4. 1,-1, 3/2

Subtopic:  Definition, Rate Constant, Rate Law |
 54%
Level 3: 35%-60%
Hints
Links

In a reaction, the rate =  k[A]1[B]-2/3 the order of the reaction is-

1. 1/3                                              

2. 2

3. -1/3                                           

4. Zero

Subtopic:  Order, Molecularity and Mechanism |
Level 3: 35%-60%
Hints
Links

When the temperature of a reaction increases from 27 oC to 37 oC, the rate increases by 2.5 times. The activation energy in the temperature range will be:

1. 53.6 kJ                                             

2. 12.61 kJ

3. 7.08 kJ                                             

4. 70.8 kJ

Subtopic:  Arrhenius Equation |
 61%
Level 2: 60%+
Hints
Links

advertisementadvertisement

The graph that represents a first-order reaction is:

1.  2.
3. 4.
Subtopic:  First Order Reaction Kinetics |
 87%
Level 1: 80%+
Hints

The rate of a reaction increases 4-fold when concentration of reactant is increased 16 times.

If the rate of reaction is 4 × 10-6 mol L-1s-1 when concentration of the reactant is 4 × 10-4  mol L-1, the rate constant of the reaction will be : 

1. 2 × 10-4 m1/2 L-1/2 s-1                            

2. 1 × 10-2 s-1

3. 4 × 10-4 mol-1/2 L-1/2 s-1                         

4. 25 mol-1L min-1                              

Subtopic:  First Order Reaction Kinetics |
 60%
Level 2: 60%+
Hints
Links

If ‘a’ is the initial concentration of a substance which reacts according to zero-order kinetics and k is the rate constant, the time for the reaction to go to completion will be:

1. a/k 2. 2/ka
3. k/a 4. Infinite
Subtopic:  Definition, Rate Constant, Rate Law | First Order Reaction Kinetics |
 79%
Level 2: 60%+
Hints
Links

advertisementadvertisement

The decomposition of a gaseous compound is given as follows:

Initial pressure, atm 1.6 0.8 0.4
Time for 50 % reaction, min 80 113 160

The order of the reaction will be:
1. 1.0 2. 1.5
3. 2.0 4. 0.5
Subtopic:  Definition, Rate Constant, Rate Law |
 51%
Level 3: 35%-60%
Hints

For a given reaction the concentration of the reactant plotted against time gave a straight line with negative slope.

The order of the reaction will be:

1. 3                                                      

2. 2

3. 1                                                      

4. 0

Subtopic:  Order, Molecularity and Mechanism |
 69%
Level 2: 60%+
Hints
Links

The relationship between temperature and the variance in reaction rate is:

1.  2.
3. 4.
Subtopic:  Arrhenius Equation |
 50%
Level 3: 35%-60%
Hints
Links

advertisementadvertisement

If a reaction A + B → C is exothermic to the extent of 30 kJ/mol and the forward reaction has an activation energy of 70 kJ/mol, the activation energy for the reverse reaction will be:

1. 30 kJ/mol                                       

2. 40kJ/mol

3. 70 kJ/mol                                       

4. 100 kJ/mol

Subtopic:  Arrhenius Equation |
 79%
Level 2: 60%+
Hints
Links