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Reaction Kinetics - 7
1.
When NaOh solution reacts with aluminum in different physical states, most rapid reaction occurs with.
a) Aluminum foil
b) Alloy of aluminum
c) Cubes of aluminum
d) Aluminum powder.
2.
The substance that atters the rate of a chemical reaction but recovered unchanged at the end is called.
a) Reactant
b) None of the above.
c) Product
d) Catalyst
3.
A catalyst
a) Increases the rate of forward reaction & decreases the rate of reverse reaction.
b) Increases the rate of forward reaction.
c) Changes equilibrium position.
d) Increases the rate of both forward and reverse reactions.
4.
Poisoning of a catalyst may be temporary or permanent in permanent poisoning.
a) Physical state of catalyst changes
b) Catalyst reacts with the poison
c) Catalyst reacts with reactant.
d) Catalyst reacts with product
5.
When rate of reaction is retarded by adding a substance, it is said to be
a) Catalyst
b) None of the above.
c) Negative catalyst
d) Auto catalyst
6.
Indicate the enzyme which catalyses the following reaction
H
2
N-C-NH
2
+H
2
O 2NH
3
+ CO
2
a) Diastase.
b) Zymase
c) Invertase
d) Urease
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