In first order reaction, 20 % concentration remains after 10 min. What would be the rate constant of reaction if $\log_{10}(5) = 0.6989$?

Identify a type of order of reaction that its unit of rate constant is mol dm$^{-3}$s$^{-1}$ from the following.

Identify the dimensional nature of nanoparticles by the following.

Which of the following statements is correct for the spontaneous adsorption of a gas?