At high pressure the following reaction is zero order-
The correct statements among the following is:
(a) | Rate of reaction = Rate constant |
(b) | Rate of the reaction depends on the concentration of ammonia |
(c) | Rate of decomposition of ammonia will remain constant until ammonia disappears completely |
(d) | Further increase in pressure will change the rate of reaction |
1. | (a, b, c) | 2. | (b, c, d) |
3. | (a, c, d) | 4. | (a, b, d) |
During decomposition of an activated complex
(a) | Energy is always released. |
(b) | Energy is always absorbed. |
(c) | Energy does not change. |
(d) | Reactants may be formed. |
The correct choice among the given is -
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
The correct statements among following about Maxwell, Boltzmann distribution of energy is -
(a) | The fraction of molecules with the most probable kinetic energy decreases at higher temperatures |
(b) | The fraction of molecules with the most probable kinetic energy increases at higher temperatures |
(c) | Most probable kinetic energy increases at higher temperatures |
(d) | Most probable kinetic energy decreases at higher temperatures |
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, c)
The correct statements among the following regarding Maxwell, Boltzmann distribution curve of energy is -
a. | The area under the curve must not change with an increase in temperature. |
b. | The area under the curve increases with increase in temperature. |
c. | Area under the curve decreases with increase in temperature. |
d. | With an increase in temperature curve broadens and shifts to the right-hand side. |
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
The correct statements among the following regarding the Arrhenius equation is/are -
(a) | Rate of a reaction increases with an increase in temperature |
(b) | Rate of a reaction increases with a decrease in activation energy |
(c) | Rate constant decreases exponentially with an increase in temperature |
(d) | Rate of reaction decreases with a decrease in activation energy |
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
The correct statements among the following is:
(a) | Catalyst provides an alternative pathway to the reaction mechanism |
(b) | Catalyst raises the activation energy |
(c) | A catalyst lowers the activation energy |
(d) | Catalyst alters enthalpy change of the reaction |
1. | (a, b) | 2. | (b, c) |
3. | (c, d) | 4. | (a, c) |
The graphs that represent a zero-order reaction are:
(a) | (b) | ||
(c) | (d) |
1. | (a, b) | 2. | (b, c) |
3. | (c, d) | 4. | (a, d) |
The correct graphical representation of first-order reaction is:
(a) | (b) | ||
(c) | (d) |
1. | (a) and (b) | 2. | (b) and (c) |
3. | (c) and (d) | 4. | (a) and (d) |
Match the graph given in Column I with the order of reaction given in Column II.
More than one item in Column I may be linked to the same item in Column II:
Column I | Column II | ||
(i) | (a) | 1st order | |
(ii) | (b) | Zero order | |
(iii) | |||
(iv) |
(i) | (ii) | (iii) | (iv) | |
1. | (a) | (b) | (a) | (b) |
2. | (a) | (b) | (b) | (a) |
3. | (a) | (a) | (b) | (b) |
4. | (b) | (b) | (a) | (a) |
Column I | Column II | ||
A. | Catalyst alters the rate of reaction | 1. | Proper orientation is not there always |
B. | 2. | By lowering the activation energy | |
C. | Energetically favorable reactions are sometimes slow | 3. | Total probability is one |
D. | Area under the Maxwell-Boltzmann curve is constant | 4. | Refers to the fraction of molecules with energy equal to or greater than the activation energy |
Codes:
A | B | C | D | |
1. | 2 | 4 | 1 | 3 |
2. | 3 | 1 | 4 | 2 |
3. | 1 | 4 | 3 | 2 |
4. | 3 | 4 | 1 | 2 |