`90%` of a first order reaction was completed in `100 min`.What is the half life of the reaction ?

80% of a first order reaction was completed in 70 min. What is the half life of the reaction?

70% of a first order reaction was completed in 70 min . What is the half life of the reaction?

70% of a first order reaction was completed in 70 min . What is the half life of the reaction?

One fourth of a first order reaction is completed in 32 mins. What is the half life of the reaction?

A first order reaction is 75% complete in 60 min. Find the half life period of the reaction?

90% of the first order reaction is completed in 70 minutes. The velocity constant of the reaction is :

90% of a first order reaction was completed in 100 min . How much time it will take for 80% completion of a reaction