Free Lattice Energy MCQs with Answers
26 Lattice Energy MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Lattice energy describes the energy released when gaseous ions form one mole of an ionic solid, or the energy required to separate that solid into gaseous ions, depending on the convention used. Its value depends mainly on ionic charge and radius and is calculated through Born-Haber cycles.
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- A. needed to melt one mole of an ionic solid
- B. needed to vaporise one mole of a liquid
- C. released when one mole of an ionic crystal is formed from its gaseous ions
- D. absorbed when an electron is added to a gaseous atom
Explanation: Bringing gaseous ions together into an ordered lattice releases a large amount of energy, so lattice energy is strongly exothermic and is…
Correct answer: released when one mole of an ionic crystal is formed from its gaseous ions- A. the charges on the ions increase and their radii decrease
- B. the charges on the ions decrease
- C. the ions become larger
- D. the compound is dissolved in water
Explanation: Electrostatic attraction is proportional to the product of the charges and inversely proportional to the distance between the ion centres…
Correct answer: the charges on the ions increase and their radii decrease- A. NaCl
- B. KCl
- C. MgO
- D. KBr
Explanation: Magnesium oxide is built from doubly charged Mg2+ and O2- ions that are also small, so both factors in the electrostatic expression work…
Correct answer: MgO- A. measures lattice energy directly in a calorimeter
- B. applies Hess's law to relate lattice energy to quantities that can be measured
- C. predicts the shape of the crystal
- D. measures the melting point of the ionic solid
Explanation: Lattice energy cannot be measured in an experiment, so the cycle links it to the enthalpy of atomisation, ionisation energy, electron…
Correct answer: applies Hess's law to relate lattice energy to quantities that can be measured- A. LiF
- B. NaCl
- C. KBr
- D. CsI
Explanation: Lattice energy decreases as the distance between oppositely charged ions increases, while all these salts contain ions with charges of +1…
Correct answer: CsI- A. A1+3
- B. Cs+
- C. Ba+
- D. Mg+2
Explanation: Heat of hydration becomes larger as ionic charge density increases because a highly charged, small ion attracts water molecules most…
Correct answer: A1+3- A. Na+
- B. K+
- C. Mg+2
- D. Ca+2
Explanation: Mg2+ has the maximum hydration energy because its double positive charge is concentrated in a relatively small ion, producing the…
Correct answer: Mg+2- 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
Correct answer: Crystal energy- 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.
Correct answer: LiCl- 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.
Correct answer: Released- 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.
Correct answer: MgO- 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…
Correct answer: Lattice energy of crystal- 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.
Correct answer: CsCl- 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.
Correct answer: Becomes less tight- 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.
Correct answer: Low EF- 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.
Correct answer: Al+3- 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.
Correct answer: Formation- 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…
Correct answer: Lattice energy- 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.
Correct answer: Born-Haber cycle- A. Released
- B. Absorbed
- C. Remain the same
- D. Constant
Explanation: Oppositely charged ions form a crystalline lattice which releases lattice energy.
Correct answer: ReleasedLattice Energy MCQs: common questions
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There are 26 Lattice Energy MCQs in the Chemistry bank, shown 20 to a page with the correct answer and an explanation on each.
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