The deterioration of a metal by an electrochemical process is commonly termed as

Electrochemical corrosion can occur, only if __________ is present in contact with metal.

A

Air

B

Oxygen

C

Liquid medium

D

Gaseous medium

The damage/deterioration of metals by the __________ action of fluids is called 'erosion'.

A

Abrasive

B

Corrosive

C

Both A & B

D

Neither A nor B

Which one is the correct verb form of 'deterioration"?

A

Determine

B

Degeneration

C

Deteriorate

D

Territory

The materials which fracture even at small strains are termed as brittle, while those materials which exhibit an appreciable deformation before failure are termed as

A

Rigid

B

Tough

C

Ductile

D

Plastic

Fe(s) |Fe2+ (aq) || Br2 (l) ; Br- (aq)| Pt(s) তড়িৎ রাসায়নিক কোষের সঠিক কোষ-বিক্রিয়া কোনটি? (Which one is the correct cell reaction of the given electrochemical cell?)

A

Fe+Br2→Fe2++2Br-

B

Fe+2Br-→Fe2++2Br2

C

Fe2++Br2→Fe+2Br-

D

Fe+Br2→Fe3++2Br-

Fes|Fe2+aq∥Br2I; Br-aq| pts তড়িৎ রাসায়নিক কোষের সঠিক কোষ-বিক্রিয়া কোনটি? (Which one is the correct cell reaction of the given electrochemical cell?)

A

Fe+Br2→Fe2++2Br

B

Fe+2Br-→Fe2++Br2

C

Fe2++Br2→Fe+2Br

D

Fe+Br2→Fe3++2Br

The cathode in an electrochemical cell always carries

A

negative charge

B

positive charge

C

zero charge

D

positive or negative charge depending upon the nature of the cell

An electrochemical cell which is used as a source of direct electrical current at constant voltage under standard conditions is called a :

A

Power transmittor

B

Battery

C

Uninterrupted power supply (UPS)

D

Generator

The battery is an electrochemical device, which means battery

A

Makes chemicals by mechanical means

B

Uses chemical action to provide electricity

C

Has curved plates instead of flat plates

D

Does not use an electrolyte

In electrochemical machining, the gap between the tool and work is kept as

A

0.1 mm

B

0.4 mm

C

0.35 mm

D

0.75 mm

The deterioration of a metal by an electrochemical process is commonly termed as

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