" For a first order reaction times taken for \(1/4^{th}\) the completion is "20" minutes, the time required for "3/4" the completion is ? "

For a first order reaction, if the time taken for completion of 50% of the reaction is t second, the time required for completion of 99.9% of the reaction is nt . Find the value of n?

Show that for a first order reaction, time required for 99.99% of the reaction to take place is 10 times the time required for the completion of half of the reaction.

For a first order reaction, show that the time required for 99% completion is twice the time required for the completion of 90% of reaction.

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

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

For a 1^("st") order reaction, time required for completion of 99% reaction is 10 min. Calculate time required for completion of 99.9% (in min.)

75 % of first order reaction is complete in 30 minutes. What is the time required for 93.75 % of the reaction (in minutes) ?