Match List-I with List-II
|
List-I Material |
List-II Conductivity/$Sm^{-1}$ at 298K |
|
(A) Gold |
(I) $4.5 × 10^3$ |
|
(B) Glass |
(II) $3.5 × 10^{-5}$ |
|
(C) Silicon |
(III) $1.0 × 10^{-16}$ |
|
(D) Pure water |
(IV) $1.5 × 10^{-2}$ |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → (A)-(I), (B)-(III), (C)-(IV), (D)-(II)
|
List-I Material |
List-II Conductivity/$Sm^{-1}$ at 298K |
|
(A) Gold |
(I) $4.5 × 10^3$ |
|
(B) Glass |
(III) $1.0 × 10^{-16}$ |
|
(C) Silicon |
(IV) $1.5 × 10^{-2}$ |
|
(D) Pure water |
(II) $3.5 × 10^{-5}$ |
(A) Gold: As a metal, gold is an excellent conductor. Its conductivity is very high, typically in the range of $10^3$ to $10^7 \text{ S m}^{-1}$. From the options, the highest value is $4.5 \times 10^3 \text{ S m}^{-1}$.
(B) Glass: Glass is a well-known insulator. Insulators have extremely low conductivity values. The value $1.0 \times 10^{-16} \text{ S m}^{-1}$ represents the typical range for an insulator like glass.
(C) Silicon: Silicon is a semiconductor. Its conductivity lies between that of conductors and insulators. Pure (intrinsic) silicon has a moderate conductivity value, which matches $1.5 \times 10^{-2} \text{ S m}^{-1}$.
(D) Pure water: Pure water is a very poor conductor (a weak electrolyte) due to the low concentration of $H^+$ and $OH^-$ ions. Its conductivity is approximately $3.5 \times 10^{-5} \text{ S m}^{-1}$ it corresponds to (II)).