What is maximum number of electrons accommodated in a subshell having azimuthal quantum number, $$\ell$$ = 2 ?

Half-life and rate constant for first order reaction are related by equation,

What is the conductivity of 0.02 M HCl solution if molar conductivity of the solution at 25$$^\circ$$C is 412.3 $$\Omega^{-1}$$ cm$$^{-1}$$ mol$$^{-1}$$ ?

Which among the following is a source of wool?