Choose the answer which presents the chemical formulas for two substances in order of decreasing melting point (highest melting point first) and gives a valid reason for this order. a) CO > C(diamond) because CO has a triple bond and stronger dispersion forces. b) C6Cl6 > C6H6 due to ionic bonding in C6Cl6 not present in C6H6. c) CaO > ScN due to ionic forces in CaO not present in ScN. d) Al > H2O due to strong metallic bonding in Al, versus weaker hydrogen bonding in H2O. e) CF4 > XeF4 due to ionic bonding in CF4 not present in XeF4.

World of Chemistry, 3rd edition
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ISBN:9781133109655
Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste
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Chapter14: Liquids And Solids
Section: Chapter Questions
Problem 3A
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Choose the answer which presents the chemical formulas for two substances in order of decreasing melting point (highest melting point first) and gives a valid reason for this order.



a) CO > C(diamond) because CO has a triple bond and stronger dispersion forces.
b) C6Cl6 > C6H6 due to ionic bonding in C6Cl6 not present in C6H6.
c) CaO > ScN due to ionic forces in CaO not present in ScN.
d) Al > H2O due to strong metallic bonding in Al, versus weaker hydrogen bonding in H2O.
e) CF4 > XeF4 due to ionic bonding in CF4 not present in XeF4.
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