MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Select the correct option from the following option. |
| A. | Catalyst is used to increase the rate of reaction by altering chemically during the course of reaction |
| B. | Catalyst is used to decrease the rate of reaction by altering chemically during the course of reaction |
| C. | Catalyst is used to increase the rate of reaction and remains unaltered chemically during the course of reaction |
| D. | Catalyst is used to decrease the rate of reaction and remains altered chemically during the course of reaction |
| Answer» D. Catalyst is used to decrease the rate of reaction and remains altered chemically during the course of reaction | |
| 2. |
The reactions register an increase in rates in the presence of radiations of specific wavelengths. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
The reaction rate is greatly influenced by ___________ |
| A. | Nature of bond in the reactant molecules |
| B. | Strength of bond in the reactant molecules |
| C. | Both nature and strength of the reactant molecules |
| D. | It does not depend on either nature or strength of the reactant molecules |
| Answer» D. It does not depend on either nature or strength of the reactant molecules | |
| 4. |
The effective collisions between the reactant molecules at higher temperatures ___________ |
| A. | Increase |
| B. | Decrease |
| C. | Remains same |
| D. | First increase then decrease |
| Answer» B. Decrease | |
| 5. |
Molecularity of a reaction is equal to the total number of _____________ |
| A. | Products formed in the elementary step |
| B. | Reactants taking part in elementary step |
| C. | Reactants and products in the elementary step |
| D. | Reactants and products in the final step |
| Answer» C. Reactants and products in the elementary step | |
| 6. |
THE_REACTIONS_REGISTER_AN_INCREASE_IN_RATES_IN_THE_PRESENCE_OF_RADIATIONS_OF_SPECIFIC_WAVELENGTHS.?$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 7. |
Select_the_correct_option_from_the_following_option.$ |
| A. | Catalyst is used to increase the rate of reaction by altering chemically during the course of reaction |
| B. | Catalyst is used to decrease the rate of reaction by altering chemically during the course of reaction |
| C. | Catalyst is used to increase the rate of reaction and remains unaltered chemically during the course of reaction |
| D. | Catalyst is used to decrease the rate of reaction and remains altered chemically during the course of reaction |
| Answer» D. Catalyst is used to decrease the rate of reaction and remains altered chemically during the course of reaction | |
| 8. |
The reaction rate is greatly influenced b? |
| A. | Nature of bond in the reactant molecules |
| B. | Strength of bond in the reactant molecules |
| C. | Both nature and strength of the reactant molecules |
| D. | It does not depend on either nature or strength of the reactant molecules |
| Answer» D. It does not depend on either nature or strength of the reactant molecules | |
| 9. |
Concentration of the reactants is __________ proportional to the number of collisions and _________ proportional to the reaction rate. |
| A. | Directly, inversely |
| B. | Directly, directly |
| C. | Inversely, directly |
| D. | Inversely, inversely |
| Answer» C. Inversely, directly | |
| 10. |
The effective collisions between the reactant molecules at higher temperatures |
| A. | Increase |
| B. | Decrease |
| C. | Remains same |
| D. | First increase then decrease |
| Answer» B. Decrease | |
| 11. |
Which of the following factor does not effect the rate of reaction? |
| A. | Concentration of the reactant |
| B. | Temperature |
| C. | Pressure |
| D. | Effect of catalyst |
| Answer» D. Effect of catalyst | |
| 12. |
Which of the following statement is incorrect about the molecularity of a reaction? |
| A. | It is a theoretical concept |
| B. | Each step of a multi-step reaction has a unique molecularity |
| C. | It is equal to the total number of reactants taking part in elementary step |
| D. | It can be zero, fractional or integer |
| Answer» E. | |
| 13. |
The elementary processes with molecularity greater than ________ are not known. |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 0 |
| Answer» D. 0 | |
| 14. |
The molecularity of a multi-step reaction does not make any sense. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 15. |
Molecularity of a reaction is equal to the total number of |
| A. | Products formed in the elementary step |
| B. | Reactants taking part in elementary step |
| C. | Reactants and products in the elementary step |
| D. | Reactants and products in the final step |
| Answer» C. Reactants and products in the elementary step | |