QUIZ
Bab 7
9 hours ago by
11 questions
Q. Which equation represents the standard enthalpy of atomisation?
answer choices
1/8 S 8 (s) -> S (g)
Na (s) -> Na (l)
Cl2 (g) -> 2Cl (g)
CH4 (g) -> C (g) + 2H2 (g)
Q. Which simple covalent molecule has the highest standard enthalpy of atomisation?
answer choices
N2
NO
O2
O3
Q. In a Born-Haber cycle for a metal oxide, which one always show NEGATIVE values?
answer choices
First electron affinity, Lattice energy
Enthalpy of atomisation, First ionisation energy,
Second ionisation energy, Second electron affinity,
Q. Which compound has the lowest lattice energy?
answer choices
CsCl
CaCl2
K2O
MgCl2
Q. NaCl, KCl, MgCl2 and CaCl2 are examples of soluble salts. Which is the correct sequence of salts in order of their increasing lattice energies?
answer choices
KCl, NaCl, CaCl2, MgCl2
NaCl, KCl, MgCl2, CaCl2
NaCl, MgCl2, KCl, CaCl2
MgCl2, CaCl2, NaCl, KCl
Q. X and Y are alkali metals. The melting points of XCl and YCI are 770oC and 801 oC respectively. The radius of the Y ion is ______ than that of the X.
answer choices
smaller
bigger
Q. The melting points of XCl and YCI are 770oC and 801 oC respectively. Which has higher lattice energy?
answer choices
YCl
XCI
Q. The melting points of XCl and YCI are 770oC and 801 oC respectively. Which is the charge density ion is smaller?
answer choices
X ions
Y ions
Q. LiCl and NaCl have similar standard enthalpies of formation but different lattice energy. Which compound has a higher lattice energy?
answer choices
LiCl
NaCl
Q. Factors that contribute to the difference in the lattice energy.
answer choices
charge of both cation and anion
Inter ionic radius
Ionisation energy
Q. Heat is absorbed when NaCl dissolves in water. Which enthalpies are involved in the solubility of this compound?
answer choices
Hydration energy & Lattice energy
Electron affinity & Ionisation energy
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