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Questions and Answers
What type of crystal lattice is the sodium chloride crystal?
What type of crystal lattice is the sodium chloride crystal?
- Simple cubic lattice
- Hexagonal close-packed (hcp) lattice
- Body-centered cubic (bcc) lattice
- Face-centered cubic (fcc) lattice (correct)
Why are most ionic compounds solids with high melting and boiling points?
Why are most ionic compounds solids with high melting and boiling points?
- Due to the strong electrostatic forces between the ions (correct)
- Due to the weak electrostatic forces between the ions
- Due to the presence of covalent bonds
- Due to the absence of electrostatic forces
Why are some ionic compounds like magnesia (MgO) and alumina (Al₂O₃) used as refractory materials?
Why are some ionic compounds like magnesia (MgO) and alumina (Al₂O₃) used as refractory materials?
- They are very stable and can withstand high temperatures (correct)
- They are easily soluble in water
- They are good conductors of electricity
- They have low melting points
Why are crystal lattices non-conductors of electricity?
Why are crystal lattices non-conductors of electricity?
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What type of ions are present in the sodium chloride crystal lattice?
What type of ions are present in the sodium chloride crystal lattice?
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