Same chapter3 marksDifficulty: Medium
Why does hydrogen chloride gas not conduct electricity, while its aqueous solution does?
Chemical Bonding
2 marksDifficulty: Medium
Why do electrovalent compounds conduct electricity in the molten state but not in the solid state?
Original Khojo Papers practice question — not from a past board paper.
Answer
In the solid the ions are locked in fixed positions in the crystal lattice and cannot move. On melting, the lattice breaks down and the ions become free to move towards the electrodes and carry the current.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
Dissolving the solid in water frees the ions in the same way.
Related questions
From the same topic and chapter, at a similar level.
Same chapter3 marksDifficulty: Medium
What is a covalent bond? Give one example each of a single, a double and a triple covalent bond.
Chemical Bonding
Same chapter3 marksDifficulty: Medium
State three differences between electrovalent and covalent compounds.
Chemical Bonding
Same chapter3 marksDifficulty: Medium
What is a co-ordinate bond? Give one example.
Chemical Bonding
Same chapter3 marksDifficulty: Medium
Explain the formation of magnesium chloride from its atoms, showing the transfer of electrons.
Chemical Bonding
Same chapter3 marksDifficulty: Medium
Draw the electron dot structure of a molecule of methane and of ammonia, and state the number of lone pairs in each.
Chemical Bonding