A first order reaction is one-fifth completed in 40 minutes. The time reuired for its `100%` completion is :

A 1st order Reaction is 40% complete in 10 minutes. Calculate the time required for 75 % completion.

A first order reaction is 25% complete in 30 minutes. Calculate the time required for 3/4 completion of the reaction.

A first order reaction is 40% completed in 50 minutes. What is the time required for 90% of the reaction to complete?

A first order reaction completes 60% in 20 minutes. The time required for the completion of 90% of the reaction is approx………..

A first order reaction is half completed in 45 minutes.The time required to complete 99.9% of the reaction

A first order reaction is 20% complete in the 10 minutes. Calculate the time period for 75% completion of the reaction.

20% first order reaction is completed in 50 minute. Time required for the completion of 60% of the reaction is