Unit 2 Exam 1 Practice

Which of the following compounds contains the bond with the smallest polarity?

• NH₃

• BeF₂

• CH₄

• O₂

Rank from lowest to highest in crystal lattice energy: NaBr, SrO, MgO, Al₂O₃

• NaBr,SrO,MgO,Al₂O3

• NaBr,MgO,Al₂O₃,SrO

• NaBr,Al₂O₃,SrO,MgO

• NaBr, MgO SrO, Al₂O₃

Which of the following most represents H₂CO₃

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Which of the following best represents ethanol, C₂H₆O.

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Which best represents C₂H₃N

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Which compound is unlikely to satisfy the octet rule around the central atom?

• PH₃

• BH₃

• NH₃

• O₃

All of the following are electronic geometries except:

• Trigonal Planar

• See-Saw

• Linaer

• Octahedral

Which of the following statements is not true?

• MgCl₂ has two ionic bonds in its formula unit and is an ionic compound

• NH₃ has three polar covalent bonds and is a polar molecule

• I₃^- has two nonpolar covalent bonds and is a polar molecule

• BH₃ has three polar covalent bonds and is a nonpolar molecule

Which of the following statements is not true?

• H₂O has a bent molecular geometry and distorted bond angles

• HCN has the same molecular geometry as I₃^-

• SF₆ has the same electronic and molecular geometries

• XeF₄ and SF₆ have at least one bond angle that is the same

Determine the correct formal charges for nitrogen and oxygen in

• +1, -1

• 0, 0

• -1, +1