Which of the following materials does not form adherent oxide film on surface ?

Related Mcqs:

Case hardening is not done by________________?

A. Nitriding B. Hot dipping C. Electroplating D. Both ‘B’ & ‘C’...

In “Imperial Smelting Process” for extraction of zinc, zinc vapour thus produced is quenched in the external condenser by the use of the following _______________________?

A. Jet of water at high pressure B. Blast of air C. Mixture of water and air D. Rain of molten lead...

The heat of neutralisation remains constant, when there is a reaction between dilute solutions of strong _____________________?

A. Base and strong acid B. Base and weak acid C. Acid and weak base D. None of these...

The highest stress that a material can withstand for a specified length of time without excessive deformation is called the ____________ strength ?

A. Creep B. Endurance C. Fatigue D. None of these...

Which of the following equipments is used for liquid dispersion ?

A. Packed column B. Venturi scrubber C. Bubble cap plate column D. Wetted wall column...