Lead is unaffected by water because:

Q. The atomic size of $Ga$ and $Al$ are almost same because of:

Q. A metal slowly forms an oxide film which completely protects the metal when the film thickness is 3.956 thousandths of an inch. If the film thickness is 1.281 thou. in 6 weeks, then the time it will take before it is 2.481 thou. is :(the rate of film formation follows first-order kinetics)

Q. Aluminium metal gets corroded or 'rusted' in places that are near to the sea, because the oxide film that protects it:

Q. $Be{F}_2$ is soluble in water whereas, the fluorides of other alkaline earth metals are insoluble. This is because of the:

Q. The metal that forms a self protecting film of oxide to prevent corrosion is: