Top 1000+ Solved Material Science MCQ Questions Answer
Q. destruction of metal through unwanted or unintentional chemical or electrochemical reaction is known as
a. erosion
b. corrosion
c. both a and b
d. none of the above
Q. the corrosion which occurs due to chemical reaction between metal and atmospheric gases is known as
a. atmospheric corrosion
b. dry corrosion
c. both a and b
d. wet corrosion
Q. the extent of dry corrosion depends on
a. chemical affinity between the environment
b. adheshion between the film and metal surface
c. both a and b
d. none of the above
Q. in case of dry corroison if the protective film formed is porous
a. it gives good protection
b. it gives bad protection
c. no where it is related to corrosion resistance
d. none of the above
Q. in conducting corrosion the intensity of corrosion depends on
a. electronic and ionic conductivitie s of the film
b. type of electrons
c. type of atmosphere
d. none of the above
Q. the common example of direct corrosion is
a. rusting of iron and steel
b. corrosion of copper flashing in steel
c. tarnishing of silverware
d. all of the above
Q. the type of corrosion which takes place due to electrochemical reaction is known as
a. dry corrosion
b. wet corroison
c. none of the above
d. all of the above
Q. wet corroison occurs under conditions
a. when conducting liquid is in contact with metal
b. when two dissimilar metals are immersed in aqueous
c. single metals is dipped partially in aqueous solution of
d. all of the above
Q. in corrosion at cathodic area
a. there is gain of electrons
b. reduction takes palce
c. usually metal do not get affected
d. all of the above
Q. electrode potential of metal depends upon
a. chemical nature of metal
b. nature of solution in which metal is immmersed
c. temperature of the solution to some extent
d. all of the above
Q. in corroison at anodic area
a. there is liberation of free electrons
b. oxidation take place
c. there is tendency to destroy the metal
d. all of the above
Q. more negative electrode potential of metal indicates
a. higher probability of corrosion
b. lower probability of corrosion
c. both a and b
d. none of the above
Q. dissolution of metal as corressponding metal ions with liberatoin of electrons is known as
a. anodic reaction
b. cathodic reaction
c. oxidation
d. both a and c
Q. M --> M+ + e- is chemical reaction which is
a. anodic reaction
b. cathodic reaction
c. oxidation
d. both a and c
Q. usually in acidic environments like industrial watse, solution of non-oxidising acids the corrosion take place by
a. hydrogen evolution
b. oxyfen absorption
c. both a and b
d. none of the above