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 |
Match the items in Column I with Column II:
Column I | Column II |
A. Diamond to graphite conversion | 1. Short interval of time |
B. Instantaneous rate | 2. Ordinarily rate of conversion is imperceptible |
C. Average rate | 3. Long duration of time |
Codes:
A | B | C | |
1. | 2 | 1 | 3 |
2. | 1 | 2 | 3 |
3. | 3 | 2 | 1 |
4. | 1 | 3 | 2 |
Match the items in Column I and Column II:
Column I | Column II | ||
A. | Mathematical expression for the rate of reaction | 1. | Rate constant |
B. | Rate of reaction for zero-order reaction is equal to | 2. | Rate law |
C. | Units of rate constant for zero-order reaction is same as that of | 3. | Order of slowest step |
D. | Order of a complex reaction is determined by | 4. | Rate of reaction |
Codes:
A | B | C | D | |
1. | 3 | 4 | 1 | 2 |
2. | 1 | 2 | 3 | 4 |
3. | 2 | 1 | 4 | 3 |
4. | 4 | 1 | 3 | 2 |
Select the correct option based on statements below:
Assertion (A): | The order of the reaction can be zero or fractional. |
Reason (R): | We cannot determine order from the balanced chemical equation. |
1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
3. | (A) is True but (R) is False. |
4. | Both (A) and (R) are False. |