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For SF6, which statement about electron domain geometry is correct?

Six bonding domains and no lone pair give an octahedral electron‑domain and molecular geometry.

Four domains give tetrahedral geometry.

Seven domains give pentagonal bipyramidal geometry.

Five bonding domains and one lone pair give square pyramidal geometry.

In ClO3−, the central chlorine is best described (qualitatively) as:

Approximately tetrahedral electron‑domain geometry (three bonds + one LP) giving a trigonal‑pyramidal shape.

Linear with no lone pair.

Square planar with two lone pairs.

Trigonal planar with no lone pair on Cl.

Which set correctly matches shape and VSEPR notation?

XeF6: octahedral (AX6) with no lone pair

SO3: tetrahedral (AX3E)

BrF5: square pyramidal (AX5E)

ICl4−: seesaw (AX4E)

Which molecule has a pentagonal planar geometry?

SbF5

XeF5−

PF5

IF5

Which angle comparison is correct for methane derivatives?

∠F–C–F in CF2H2 > ∠H–C–H.

∠H–C–H in CH4 > ∠H–C–F in CH3F due to Bent’s rule (more p‑character toward F).

∠H–C–H equals ∠H–C–F in CH3F.

Electronegativity of substituents does not affect bond angles.

Which molecule is best rationalized as having 3c–4e bonding in a hypervalent framework?

CO2

NH3

CF4

XeF2

Which is the correct order of increasing bond order?

O2+ < O2 < O2−

All equal

O2− < O2 < O2+

O2 < O2− < O2+

Which diatomic has the smallest bond length?

Which statement about heteronuclear diatomics is correct?

In HF, the σ bonding MO has greater amplitude on F than on H.

In CN−, the bond order is 2.

In NO, the unpaired electron resides in a nonbonding orbital only.

In CO, the positive end of the dipole is on carbon because oxygen is more electronegative.

Which triatomic is linear in the gas phase?

SO2

BeH2

H2O

Chemistry — Unit 1 — Test 8

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