Arrange the following in the increasing order of conductivity values
(A) Glass
(B) Silver
(C) Silicon
(D) Iron
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → (A), (C), (D), (B)
Materials fall into three classes by their conductivity (κ): metals (conductors) have very large values, semiconductors such as silicon have intermediate values, and insulators such as glass have very small values. Among the metals, silver conducts better than iron:
glass (insulator) < silicon (semiconductor) < iron (metal) < silver (metal)
Shortcut: Glass (A) is the only insulator and silver (B) is the best conductor. Only Option (1) starts with (A) and ends with (B).
NCERT (2026-27 edition):
Conductance of Electrolytic Solutions – …
