Chemical Reaction Engineering
As the chemical reaction proceeds, the rate of reaction

Remains same
Increases
May increase or decrease depending on the type of reaction
Decreases

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Chemical Reaction Engineering
A space velocity of 5 hr⁻¹ means that

After every 5 hours, reactor is being filled with the feed
A fixed conversion of a given batch of feed takes 5 hours
Cent per cent conversion can be achieved in at least 5 hours
Five reactor volumes of feed (at specified conditions) are being fed into the reactor per hour

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Chemical Reaction Engineering
In a zero order reaction, reactants concentration does not change with time and the

Time for half change is independent of the initial concentration
Time for half change is half the time taken for completion of the reaction
Reaction rate is trebled when the initial concentration is trebled
Time for completion of the reaction is independent of the initial concentration

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