Navigate

Which of the following does not show electrical conduction

Which of the following does not show electrical conduction

Options

(a) Diamond
(b) Graphite
(c) Potassium
(d) Sodium

Correct Answer:

Diamond

Explanation:

Potassium and sodium are metals so have mobile electrons. In graphite, each of the C-atom is covalently bonded to three other C-atoms so one valence electron is available for electrical and thermal conduction there is no mobile electron present in diamond as each C-atom is bonded to four other C-atoms by covalent bond.

AIPMT1999
admin:

Related Questions

  1. A ideal gas will have maximum density when
  2. In the reaction : 2P₂O₅ + 2HNO₃ → P₄O₁₀ + x, the term x is
  3. When initial concentration of a reactant is doubled in a reaction, its half-life
  4. Standard enthalpy of vaporisation Δvap H⁰ for water at 100⁰C is 40.66 kJ mol⁻¹.
  5. In which of the following pairs of molecules/ions, the central atoms have