Free Solids MCQs with Answers

• A. lonic
• B. Molecular
• C. Covalent
• D. Metallic

Explanation: Molecular crystals are formed by individual molecules held together by various types of intermolecular forces, including London dispersion…

• A. Face-centered cubic
• B. Metallic appearance
• C. 1-1 (g) > 1-1 (s) Bond length
• D. 1-1 (g) < 1-1 (s) Bond length

Explanation: In solid iodine, the molecules are closer together due to the packing in the crystal lattice, resulting in a longer bond length compared…

• A. Naphthalene
• B. Dry ice
• C. Iodine
• D. Sugar

Explanation: Sugar is a polar molecule and hashydrogen bonding.

• A. Dipole-dipole forces
• B. London dispersion forces
• C. Hydrogen bonding
• D. Debye forces

Explanation: Solid iodine is non-polar and has London Dispersion forces amongst molecules.

• A. Ionic crystal
• B. Molecular crystal
• C. Covalent crystal
• D. Metallic crystal

Explanation: Covalent crystals may have network structure,therefore, they have high melting points.

• A. Solid phase
• B. Molten phase
• C. Liquid phase
• D. Vapour phase

Explanation: Independent molecule of NaCl may exist in only vapour phase.

• A. Covalent
• B. Ionic
• C. Metallic
• D. Molecular

Explanation: Dry ice is an example of molecular solid (Non-polar molecular solid).

• A. Affinity energy
• B. Bond energy
• C. Crystal energy
• D. lonization energy

Explanation: lattice energy is also called crystal energy as it forms crystal by combining ions

• A. NaCl
• B. KCl
• C. KBr
• D. LiCl

Explanation: The lattice energy is the enthalpy change involved in the formation of an ionic compound from gaseous ions.

• A. Absorbed
• B. Released
• C. Dependent on crystal size
• D. None of these

Explanation: A crystal lattice is a highly ordered repeating pattern of atoms or molecules.

• A. CO2
• B. H2O
• C. NaCl
• D. MgO

Explanation: Option D is correct since in Magnesium Oxide, both Magnesium and Oxygen atoms form ions in the lattice.

• A. High electron affinity of anion forming species
• B. Lattice energy of crystal
• C. Low Ionization energy of cation forming species
• D. Low heat of sublimation of cation forming solid

Explanation: The stability of ionic crystals depends on lattice energy which is released in the form of heat when two ions are brought together to form…

• A. LiCI
• B. NaCl
• C. KCI
• D. CsCl

Explanation: The correct answer is D. CsCl. Lattice energy is the energy released when ions in the gas phase come together to form a solid lattice.

• A. Have close packing
• B. Have low empty spaces
• C. Becomes less tight
• D. Have strong electrostatic forces

Explanation: Lattice energy is inversely proportional to size of ion. Charge/Size define lattice energy.

• A. Low EF
• B. High EF
• C. EF=0
• D. EF= infinty

Explanation: The solubility of NaCl in water is due to the interaction between the ionic bonds in NaCl and the polar water molecules.

• A. Al+3
• B. Cs+
• C. Ba+
• D. Mg+2

Explanation: The heat of hydration depends upon the charge to size ratio of the ions.

• A. Combustion
• B. Dissociation
• C. Dissolution
• D. Formation

Explanation: The lattice energy of an ionic crystal is the energy released when separate gaseous ions are combined to form a solid ionic compound.

• A. Electron affinity
• B. Lattice energy
• C. Crystal energy
• D. Both B and C

Explanation: The Born-Haber cycle is a thermochemical cycle that allows us to calculate the lattice energy of an ionic compound by considering the…

• A. Born-Haber cycle
• B. Bohr theory
• C. Le-Chatelier principle
• D. All of them

Explanation: Option A is correct.The Born-Haber cycle is used to calculate the lattice energy of an ionic compound indirectly.

• A. Solid NaCl is covalent
• B. In the solid state, there are no ions
• C. In solid NaCl. there is no migration of ions
• D. In solid NaCl, there are not electron

Explanation: Conduction of electricity occurs when there is a free-moving charge (electrons or ions), so the answer is C.