1.-Which of the following has no net dipole moment? andwhy? a) H 2 O b)NF 3 c)H

Question

1.-Which of the following has no net dipole moment? andwhy? a) H2O     b)NF3    c)H2Se    d)TeO3     e) CH3Cl 2.- Which of the following molecules is polar? and why? a) CH4   b) CHBr3  c) F2     d)CBr4   e) CO2 3.- The F-S-F bond angles in SF6 are:  a) 90 and 180    b) 109.5    c)120      d) 180    or e) 90 and 120   ???? 1.-Which of the following has no net dipole moment? andwhy? a) H2O     b)NF3    c)H2Se    d)TeO3     e) CH3Cl 2.- Which of the following molecules is polar? and why? a) CH4   b) CHBr3  c) F2     d)CBr4   e) CO2 3.- The F-S-F bond angles in SF6 are:  a) 90 and 180    b) 109.5    c)120      d) 180    or e) 90 and 120   ???? 3.- The F-S-F bond angles in SF6 are:  a) 90 and 180    b) 109.5    c)120      d) 180    or e) 90 and 120   ????

Explanation / Answer

1 d) TeO3 is an inorganic compound that can have Te interacting with sixnearest oxygens in an octahedral field. The symmetry of theoctahedral field renders the molecule without a dipole. NF3 is similar to NH3, trigonal pyramidal, so it does have a dipolemoment.

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