Bissoy.com
Doctors Medicines MCQs Q&A

In a galvanic couple, the corrosion rate of the metal with active corrosion potential is accelerated whereas the corrosion rate of noble metal retards preferentially.

In a galvanic couple, the corrosion rate of the metal with active corrosion potential is accelerated whereas the corrosion rate of noble metal retards preferentially. Correct Answer True

In a galvanic couple, one metal acts as the anode (active corrosion potential), and its corrosion rate is accelerated whereas other acts as the cathode (noble metal) and its corrosion rate are retards preferentially.

Related Questions

Consider the following statements.
1. Galvanic cell converts chemical energy into electrical energy.
2. In a galvanic cell, the electron flow from anode to cathode through the external circuit.
3. Galvanic cell converts metal from its elemental state to the combined state.
Which of the statement(s) given above is/are correct?
Sentences of a paragraph are given below in jumbled order. Arrange the sentences in the right order to form a meaningful and coherent paragraph.   P. Noble means doing everything without any ambition. Q. Fame does not make a man noble. R. Nobility makes a man famous. S. If a noble mind becomes sensitive to fame, he is no more 'noble'.
Corrosion of less corrosion-resistant metal is usually increased and the attack of the more corrosion-resistant is decreased in galvanic corrosion.
Which of the following statements regarding Noble gases is correct? All noble gases have a complete octet with 8  valence electrons. It is in the 18th group of the modern periodic table. All noble gases have positive electron gain enthalpy.
Which of the following noble metals will improve the corrosion resistance of titanium and chromium on galvanic coupling?
The reversible potential of gold is more positive than platinum in emf series whereas in galvanic series the position of gold is below platinum.
Consider the following statements; 1) In a reinforced concrete member subjected to flexure, the externally applied moment is resisted by an internal couple formed by steel and concrete and their magnitudes vary with the applied moment, while the lever arm of the internal couple remains constant 2) In a prestressed concrete. Member, the external moment is resisted by an internal couple, but it is the lever arm that changes with the loading conditions and the stress in steel remain practically constant Which of the above statements is/are correct?
The diffusion couple shown below is made from two A-B alloys. The initial compositions of the two alloys are indicated in the diagram. The centreline is at x = 0. The couple is held at an elevated temperature for 40 hours. Diffusivity; D = 3 × 10-11 m-2 s-1. Assume the diffusion couple to be infinitely long.
Physical Metallurgy mcq question image
Which of the parameters give the composition profile in the following form?
$$C\left( {x,t} \right) + {c_1} + {c_2}\,erf\left( {\frac{1}{{2\sqrt {Dt} }}} \right)$$
Principle: Under law, persons in possession of property are entitled to the quiet enjoyment of their property.
Factual Situation: Ram and his wife occupied a flat in New Delhi to reside peacefully during his retired life. His neighbour who was staying on rent was a young couple having a two months old baby. The cries of the baby disturbed Ram during his afternoon nap and at night. Irritated by the baby's cries, Ram asked the young couple to shift their residence, to which they turned a deaf ear. Ram wants to file a suit against the young couple for nuisance.
Consider the following statements with respect to corrosion : 1. It is a natural process that converts a refined metal into a more chemically stable form such as oxide, hydroxide, or sulfide. 2. It is accelerated by warm temperatures and by acids and salts. 3. Galvanizing can protect against corrosion of iron and steel. Which of the statements given above are correct?