Due to which of the following reasons aluminium does not corrode in atmosphere ?
Correct answer: B. Atmospheric oxygen can only diffuse very slowly through the oxide layer which is formed on the surface of aluminium
- A. Aluminium is a noble metal
- B. Atmospheric oxygen can only diffuse very slowly through the oxide layer which is formed on the surface of aluminium
- C. No reaction with oxygen occurs ft Any of the above
Explanation
Aluminium rapidly forms a thin, adherent oxide film that passivates its surface and greatly slows further oxygen diffusion and reaction. Aluminium is not a noble metal, so option a is incorrect.
Last updated
Practise Electronics and Devices
758 free Electronics and Devices MCQs from Electrical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Electrical Engineering questions like this
Electrical Engineering is on 2 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
1 db corresponds to_____________change in power level?
A 1,000 V power supply would use_____________ as a filter capacitor?
A 10 V power supply would use ____________ as filter capacitor?
A 2-transistor class B power amplifier is commonly called ______________ amplifier?
A 25eV electron has a speed of______________?