CHEM BRAIN

If concentration time graph of a reactant indicate a constant half life, then the order of reaction with respect to reactant is MDCAT2018

When initial concentration of a reactant is doubled in a reaction its half life period is not effected NEET2015-cancelled

If the rate constant for a first order reaction is k, the time required for completion of 99% of the reaction is given by  [NEET2019]

The rate constant for First order reaction is 4.6x10^-3s^-1 . the time required to reduce 2.0g of the reactant to 0.2g is:::: [NEET2020]

For a first order reaction A →Product, initial concentration of A is 0.1M which becomes 0.001 M after 5min. rate constant for the reaction in min^-1 is [NEET2022]

The half life of a first order reaction is 2000years. if the concentration after 8000 years is 0.02M then the inital concentration was [NEET-Re-2022]