The parts of motor cars are polished by chrom | vedclass

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(D) The angle of contact between a liquid and a solid surface determines whether the liquid will wet the surface or not.If the angle of contact is les

Vedclass · Accepted Answer

Greater than $90^\circ$

Vedclass · Answer

(D) The angle of contact between a liquid and a solid surface determines whether the liquid will wet the surface or not.If the angle of contact is less than $90^\circ$,the liquid wets the surface.If the angle of contact is greater than $90^\circ$,the liquid does not wet the surface.Chromium is used for polishing motor car parts because it is water-repellent,meaning it prevents water from sticking to the surface and causing corrosion.Therefore,the angle of contact between water and chromium must be greater than $90^\circ$.

The parts of motor cars are polished by chromium because the angle of contact between water and chromium is

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