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(A)Catalyst increases the rate of reacti...

(A)Catalyst increases the rate of reaction.
(R ) Catalyst functions by lowering the energy of activation.

A

Both (A) and (R ) are true and (R ) is the correct explanation of (A)

B

Both (A) and (R ) are true and (R ) is not the correct explanation of (A)

C

(A) is true but (R ) is false

D

Both (A) and (R ) are false

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The correct Answer is:
A
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AAKASH SERIES-SURFACE CHEMISTRY-Objective Excersice - 4 (ASSERTION (A)& REASON (R ) TYPE QUESTION)
  1. (A)The reaction of oxalic acid with acidified KMnO(4) first slow and t...

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  2. (A)In Haber's synthesis, the rate of formation of NH(3) is increased b...

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  3. (A)Catalyst increases the rate of reaction. (R ) Catalyst functions...

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  4. (A)A catalyst does not alter the equilibrium constant of a reaction ...

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  5. (A) NH(3) adsorbs more readily over activated charcoal than CO(2) (...

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  6. (A) : Gases between themselves cannot form a colloidal solution. (R)...

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  7. (A) Colloidal sols scatter light while true solutions do not. (R ) ...

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  8. (A) Colloidal particles show Brownian Movement (R ) Brownian movemen...

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  9. (A) A colloidal sol of As(2)S(3) is coagulated faster by 0.1 M BaCl(2)...

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  10. (A)Colloidal solutions are stable but colloidal particles do not sett...

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  11. (A) An emulsion becomes stable if saop is added to it. (R ) Saop c...

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  12. (A) Milk is an example of water in oil emulsions (R ) Emulsions con...

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  13. (A) Urease catalyses the hydrolysis of urea. (R ) All catalysts ar...

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  14. (A) Enzyme catalysed reactions are of first order. (R ) Enzyme ne...

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  15. (A)Adsorption is a surface phenomenon. (R ) During adsortion, residu...

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  16. (A) Conversion of fresh precipitate to colloidal state is called pept...

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  17. (A) Zeolites are good shape-selective catalysts (R ) Zeolites have ...

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  18. (A)Increase in surface area increases rate of evaporaton (R ) Str...

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  19. (A) Substances whose solutions cannot pass through filter paper are ca...

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  20. (A) In chemisorption , adsorption keeps on increasing with temperature...

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