Electrolytic and metallic conduction — NEET & JEE Questions

Question 1 · difficulty L1 · recall

Metallic conduction is mainly due to the movement of

• A. electrons
• B. cations through the metal lattice
• C. anions through the metal lattice
• D. neutral molecules only

Question 2 · difficulty L2 · understanding

Electrolytic conduction in a solution is mainly due to movement of

• A. ions
• B. free electrons through the bulk solution
• C. neutral solvent molecules only
• D. photons

Question 3 · difficulty L2 · understanding

A key difference between metallic and electrolytic conduction is that electrolytic conduction is generally accompanied by

• A. chemical change at electrodes
• B. no movement of charged particles
• C. zero resistance
• D. no temperature dependence

Question 4 · difficulty L2 · understanding

For a metallic conductor, resistance generally changes with increasing temperature by

• A. increasing
• B. decreasing to zero in all cases
• C. remaining exactly constant
• D. becoming negative

Question 5 · difficulty L3 · application

Which substance can conduct electricity in the molten state but not as an ionic solid because its ions become mobile only on melting?

• A. NaCl
• B. Copper metal
• C. Diamond
• D. Solid sugar

Question 6 · difficulty L3 · application

In an electrolytic cell containing an aqueous electrolyte, cations migrate toward the

• A. cathode
• B. anode
• C. salt bridge only
• D. surface regardless of charge

Question 7 · difficulty L3 · application

Which observation most clearly indicates electrolytic rather than metallic conduction?

• A. Gas evolves at an electrode while current passes
• B. The conductor becomes slightly warmer
• C. Electrons move through an external wire
• D. A voltage is applied

Question 8 · difficulty L3 · application

Why does solid NaCl fail to conduct appreciably while molten NaCl conducts?

• A. Ions are fixed in the solid lattice but mobile in the melt
• B. NaCl has no ions in the solid
• C. Electrons exist only after melting
• D. The solid contains no charges

Question 9 · difficulty L4 · application

A copper wire and a NaCl solution both carry current. Which statement correctly identifies the charge carriers?

• A. Electrons in copper; ions in NaCl solution
• B. Ions in both
• C. Electrons in both
• D. Neutral atoms in copper; water molecules in solution

Question 10 · difficulty L4 · application

On raising temperature moderately, the conductivity of an electrolyte solution often increases mainly because

• A. ionic mobility generally increases as solvent viscosity decreases
• B. ions disappear from solution
• C. metal electrons become more mobile
• D. the solution becomes a solid