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Which of the following statements is mor...

Which of the following statements is more correct ?

A

Catalyst only accelerates the rate of a chemical reaction

B

A catalyst can retard the rate of a chemical reaction

C

A catalyst can control the speed of a reaction

D

A catalyst alters the speed of a reaction

Text Solution

Verified by Experts

The correct Answer is:
D
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ALLEN-SURFACE CHEMISTRY -ASSERTION & REASO
  1. Which of the following statements is more correct ?

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  2. Assertion :- Langmuir adsorption is a single layer phenomenon. Reaso...

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  3. Assertion :- A sol of As(2)S(3) prepared by the action of H(2)S on As(...

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  4. Assertion(A): Physical adsorption of molecules on the surface requires...

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  5. Assertion :- Filtration of colloidal particles is not possible by filt...

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  6. Assertion :- A gas mixed with another gas forms a colloidal solution. ...

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  7. Assertion :- Lyophilic sol is more stable than lyophobic sol. Reaso...

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  8. Assertion :- Associated colloids are formed by aggregation of large no...

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  9. Assertion :- In case of chemical adsorption, (x)/(m) first increase th...

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  10. Assertion :- Physical adsorption forms multimolecular layer. Reason ...

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  11. Assertion :- The graphical representation of physical adsorption with ...

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  12. Assertion :- Zeolite is shape selective catalyst. Reason :- Size of ...

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  13. Assertion :- Lyophilic sol coagulate by adding other solvent. Reason...

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  14. Assertion :- Catalyst is more effective in powdered form. Reason :- ...

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  15. Assertion :- Amount of charge on hydrophobic sol is greater than hydro...

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  16. Assertion :- During physical adsorption multimolecular layers are form...

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  17. Assertion: A quious gold colloidal solution is red in colour. Reason...

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  18. Assertion: Alcohols are dehydrated to hydrocarbons in the presence of ...

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  19. Assertion(A): The micelle formed by sodiumm stearate in water has -COO...

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  20. Assertion: Reaction of SO(2) and H(2)S in the presence of Fe(2)O(3) ca...

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  21. Assertion: Fe^(3+) can be used for coagulation of As(2)S(3) sol. Rea...

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