Q. No.Which quantity is altered when a catalyst is introduced during a chemical reaction?
1.
Internal energy
2.
Enthalpy
3.
Activation energy
4.
Entropy
| 1. | Internal energy | 2. | Enthalpy |
| 3. | Activation energy | 4. | Entropy |
1. 44.1 s
2. 54.1 s
3. 24.1 s
4. 34.1 s
The rate Constant of reaction A B is 0.6 × 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
2. ln vs T
3. ln K vs
4. ln
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
(R = 8.314 J mol–1 K–1)
2. 34.7 kJ mol–1
3. 15.1 kJ mol–1
4. 342 kJ mol–1
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
In a reaction, A + B → Product, the rate is doubled when the concentration of B is doubled, and the rate increases by a factor of 8, when the concentrations of both the reactants (A and B) are doubled. The 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]
In a zero-order reaction for every 10 °C 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
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. |
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