Q. No.Consider the reaction AB. The concentration of both the reactant and the product varies exponentially with time.
The graph that accurately depicts how reactant and product concentrations change with time is:
1.
2.
3.
4.
The graph that accurately depicts how reactant and product concentrations change with time is:
Rate law expression cannot be determined from a balanced chemical equation if.
a. The reverse reaction is involved
b. It is an elementary reaction
c. It is a sequence of elementary reactions
d. Any of the reactants is in excess
The correct choice among the given is -
1. (a, b, c)
2. (b, c, d)
3. (a, c, d)
4. (a, b, d)
The correct statements among the following regarding a balanced chemical equation of an elementary reaction are-
| a. | Order is the same as molecularity. |
| b. | Order is less than the molecularity. |
| c. | Order is greater than molecularity. |
| d. | Molecularity can never be zero. |
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
The correct statements among the following regarding any unimolecular reaction are-
| a. | Only one reacting species is involved in the rate-determining step |
| b. | The order and the molecularity of the slowest step are equal to one |
| c. | The molecularity of the reaction is one and the order is zero |
| d. | Both molecularity and order of the reaction are one |
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
The correct statements among the following regarding a complex reaction are-
| a. | Order of the overall reaction is the same as the molecularity of the slowest step. |
| b. | Order of the overall reaction is less than the molecularity of the slowest step. |
| c. | Order of the overall reaction is greater than the molecularity of the slowest step. |
| d. | The molecularity of the slowest step is never zero or non-integer. |
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
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)
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