In electrolytic refining of nickel (Ni), the anode is Cu-10 atom% Ni and the cathode is pure Ni. Assuming the Cu-Ni solution to be ideal, the absolute value of the minimum voltage (in mv) required for refining is.
Given, Faraday's constant = 96490 C mole^-1, Temperature = 300 K, R = 8.314 J. mol^-1. K^-1

Intergrannular corrosion of light 18-8 stainless steel can not be prevented by

A. reducing the carbon content to less than 0.05%

B. quenching it from high temperature to prevent chromium carbide precipitation

C. adding strong carbide forming elements

D. increasing the carbon content

Which of the following metals is highest noble in the Galvanic series?

A. Platinum

B. gold

C. graphite

D. titanium

Difficult to monitor and very dangerous form of corrosion

A. Galvanic

B. Pitting

C. Crevice

D. Stress

Based on the standard galvanic series, select the correct sequence of metals in the increasing order of anodic behaviour:

A. Zn, Fe, Pt, Cu

B. Pt, Zn, Cu, Fe

C. Fe, Pt, Cu, Zn

D. Pt, Cu, Fe, Zn