Rate constant K= mol L-1 s-1 and , A is equal to
(1) 2.0
(2) 1.2 103 mol L-1 s-1
(3) 3.3 103 mol L-1 s-1
(4) 2.4 103 mol L-1 s-1
The effect of a catalyst in a chemical reaction is to change the
1. Acivation energy.
2. Equilibrium concentration.
3. Heat of reaction.
4. Final products.
When the concentration of reactant was made 4 times rate of reaction becomes 8 times. The order of reaction with respect to that reactant is
1. 2
2. 3
3. 1
4. 1.5
The rate constant for a reaction of zero-order in A is 0.0030 mol L-1 s-1. How long will it take for the initial concentration of A to fall from 0.10 M to 0.075 M?
1. 8.3 sec
2. 0.83 sec
3. 83 sec
4. 10.3 sec
A first-order reaction is 15 % completed in 20 minutes. The amount of time required to complete 60 % of the reaction is:
1. | 112.8 min | 2. | 120.7 min |
3. | 100.4 min | 4. | 140.7 min |
The units of rate constant and rate of reaction are same for:
1. First order reaction
2. Second order reaction
3. Third order reaction
4. Zero order reaction
Assertion : If the activation energy of reaction is zero temperature will have no effect on the rate constant.
Reason : Lower the activation energy fasten is the reaction.
Assertion : For a reaction
activation energy is 4135 J/mol.
Reason : Since for any reaction, values of rate constant at two different temp is same therefore
activation energy of the reaction is zero.
If concentration are measured in mole/litre and time in minutes , the unit for the rate constant of a order reaction are
(1)
(2)
(3)
(4)
The following reaction was carried out at 300 K.
2SO2(g) + O2(g) → 2SO3(g)
The rate of formation of is related to the rate of disappearance of by the following expression:
1.
2.
3.
4. None of the above.