Question

Match the terms in Column I with the corresponding attributes in Column II:

Column I	Column II
(P) Wiedemann-Franz law	(1) Charge carrier concentration
(Q) Neel temperature	(2) Paramagnetism
(R) Hall voltage	(3) Ratio between thermal conductivity and electrical conductivity of metals
(S) Curie law	(4) Diamagnetism
	(5) Anti-ferromagnetism

• A. P-4, Q-3, R-2, S-1
• B. P-2, Q-5, R-1, S-3
• C. P-3, Q-5, R-1, S-2
• D. P-3, Q-4, R-5, S-2

Hint:

Recall that Wiedemann-Franz links thermal and electrical conductivity, Neel temperature marks antiferromagnetic order, Hall voltage gives carrier concentration, and Curie law describes paramagnetism; diamagnetism is a distractor.

Answer 1

The Correct Option is C

Step 1: Understand what is being matched.
Column I lists four named laws or physical terms from physical/electronic metallurgy. Column II lists five possible attributes, one of which is a distractor that does not match anything in Column I. We need to link each term to its correct attribute.

Step 2: Match Wiedemann-Franz law (P).
The Wiedemann-Franz law states that for metals, the ratio of thermal conductivity to electrical conductivity is proportional to temperature, with a nearly constant proportionality factor called the Lorenz number.
\[ \frac{k}{\sigma} = LT \]
So P matches with (3) Ratio between thermal conductivity and electrical conductivity of metals.

Step 3: Match Neel temperature (Q).
Below the Neel temperature, a material becomes antiferromagnetic, meaning the magnetic moments of neighboring atoms align in opposite directions, cancelling each other out. Above it, the material turns paramagnetic.
So Q matches with (5) Anti-ferromagnetism.

Step 4: Match Hall voltage (R).
The Hall effect produces a transverse voltage when a current-carrying conductor is placed in a magnetic field. Measuring this Hall voltage lets us find the sign and the concentration of the charge carriers in the material.
So R matches with (1) Charge carrier concentration.

Step 5: Match Curie law (S).
Curie law describes how the magnetic susceptibility of a paramagnetic material varies inversely with absolute temperature.
\[ \chi = \frac{C}{T} \]
So S matches with (2) Paramagnetism.

Step 6: Note the unused option.
Option (4) Diamagnetism is not linked to any term in Column I. It is a distractor added to make the matching harder.

Step 7: Compile the match and check the options.
The correct match is P-3, Q-5, R-1, S-2, which is option (C).

Final Answer:
\[ \boxed{\text{P-3, Q-5, R-1, S-2}} \]