Due to which of the following reasons aluminium does not corrode in atmosphere ?

Related Mcqs:

A highly conductive material must have___________?

A. highest conductivity B. lowest temperature co-efficient C. good mechanical strength D. good corrosion resistance E. easy solderable and drawable quality F. all of the above...

An H.R.C. fuse is_______________?

A. a ceramic body having metal and caps B. a wire of platinum C. a heavy cross-section of copper or aluminium D. a ceramic tube having carbon rod inside it...

A carbon resistor contains_____________?

A. carbon crystals B. solid carbon granules C. pulverized coal D. finely divided carbon black...

Which of the following material is not a semiconductor ?

A. Silica B. Germanium C. Selenium D. Gallium-arsenide...

is an element used in semiconductors whose atoms have three valence electrons?

A. An acceptor B. A donor C. Germanium D. Silicon...