Free Ionic and Molecular Crystals MCQs with Answers
62 Ionic and Molecular Crystals MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Ionic crystals contain oppositely charged ions held by electrostatic forces, whereas molecular crystals contain discrete molecules joined by weaker intermolecular forces. Their structures explain differences in melting point, hardness, volatility, solubility and electrical conductivity, especially between solid and molten states.
Last updated
62 questions · page 2 of 4
- A. Diamond
- B. Sulphur
- C. Graphite
- D. None of the above
Explanation: Molecular crystals are substances that have relatively weak intermolecular binding, such as dry ice (solidified carbon dioxide), solid…
Correct answer: Sulphur- A. Ionic Solid
- B. Metallic Solid
- C. Molecular Solid
- D. Covalent Solid
Explanation: A molecular solid is composed of molecules held together by van der Waals forces. It is a solid that consists of discrete molecules.
Correct answer: Molecular Solid- A. Excited
- B. Energized
- C. Free
- D. In random motion
Explanation: To conduct energy through Ionic Solids, the ions should be free to move.
Correct answer: Free- A. Liquid water
- B. Diamond
- C. Graphite
- D. Sucrose
Explanation: The correct option is B. The structure of ice is similar to the structure of DIAMOND.
Correct answer: Diamond- A. Neutral crystals
- B. Polar crystals
- C. Polar and non-polar crystals
- D. Non-polar crystals
Explanation: Molecular solid may be polar or non-polar in nature.An example of polar molecular solid is sucrose and an example of a non-polar molecular…
Correct answer: Polar and non-polar crystals- A. Atoms
- B. Anions
- C. Cations
- D. Molecules
Explanation: d) Molecules:This is the correct answer. Ice crystals are formed by the arrangement of water molecules (H2O) in a specific pattern.
Correct answer: Molecules- A. 143 pm
- B. 271 pm
- C. 227 pm
- D. 166 pm
Explanation: Option: B In solid iodine, the bond distance between I-I is 271m. The reason is simple.
Correct answer: 271 pm- A. Ionic
- B. Metallic
- C. Covalent
- D. Molecular
Explanation: Ionic solids are crystals held together by ionic bonding between oppositely charged anions and cations.
Correct answer: Molecular- A. Ionic solids
- B. Molecular solids
- C. Network covalent solids
- D. Metallic solids
Explanation: It is correct as Metallic solids are composed of metal cations held together by a delocalized "sea" of valence electrons.
Correct answer: Metallic solids- A. High
- B. Low
- C. Sharp
- D. None of these
Explanation: Non-polar molecular solids have the weakest form of intermolecular forces - instantaneous dipole-induced dipole forces - which require…
Correct answer: Low- A. Low
- B. Moderate
- C. High
- D. Cannot be predicted
Explanation: Polar molecules have permanent dipoles resulting in strong intermolecular forces of attraction- permanent dipole-permanent dipole forces-…
Correct answer: High- A. Due to stronger dipole forces
- B. Due to polarity
- C. Due to stronger London forces
- D. Due to stronger Debye forces
Explanation: Option C is correct because as we go down the group the atomic number of the halogens increases so they have more electrons and "greater…
Correct answer: Due to stronger London forces- A. NaCl
- B. KBr
- C. MgCl2
- D. CO
Explanation: Ionic solids are composed of cations and anions held together by electrostatic force. whereas CO has a coordinated covalent bond.
Correct answer: CO- A. Sugar
- B. Ice
- C. Boron Nitride
- D. Solid Iodine
Explanation: Option C is correct since boron nitride exists as a giant molecular structure and has a structure similar to graphite.
Correct answer: Boron Nitride- A. Polar molecular solid
- B. Non-polar molecular solid
- C. Ionic solid
- D. Covalent solid
Explanation: Solids in which atoms and molecules are held together by intermolecular forces are called molecular solids.
Correct answer: Polar molecular solid- A. Molecular crystals
- B. Covalent solids
- C. Ionic Crystals
- D. Metallic solids
Explanation: Isomorphism is exhibited by ionic crystal. As the crystals are similar in shape and the forces within and between molecules and ions are…
Correct answer: Ionic Crystals- A. High vapor pressure
- B. Good conductivity
- C. Low melting point
- D. Solubility in polar solvents
Explanation: Ionic compounds dissolve in polar solvents, especially water. This occurs when the positive cation from the ionic solid is attracted to…
Correct answer: Solubility in polar solvents- A. Van der Waal forces
- B. Dipole Dipole Interaction
- C. Both Options A and B are correct
- D. Electrostatic forces
Explanation: Two types of intermolecular forces hold the particles together in molecular solids: dipole-dipole interactions and van der waal forces.
Correct answer: Both Options A and B are correct- A. An atomic crystal
- B. ionic crystal
- C. a molecular crystal
- D. metallic
Explanation: The structure mentioned above is a molecular crystal because molecular crystals have low melting points as the one mentioned above, have…
Correct answer: a molecular crystal- A. Low melting point
- B. Good conductivity in solid state
- C. High vapour pressure
- D. Solubility in polar solvent
Explanation: Solubility is based on the principle, "like dissolves like"
Correct answer: Solubility in polar solvent