A drop of solution (volume 0.05mL) contains 3×10⁻⁶ mole of H⁺. If the rate constant of disappearance of H⁺ is 10⁷ mol litre⁻¹ sec⁻¹, how long would it take for H⁺ in the drop to disappear?
a) 6x10⁻8sec
b) 6x10⁻⁹sec
c) 6x10⁻¹⁰sec
d) 6x10⁻¹²sec