Onramps Chemistry Unit 2 review

Consider the labeled bonds in the molecule below and rank them from least to most polar in terms of difference in electronegativity.

• d < c < a < e < b

• d < c < e < a < b

• a < b < c < d < e

• d < c < d < e < a

• e < b < d < c < a

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Practice exam problem for formal charge: What is the formal charge on the nitrogen atom in ammonia?

• -1

• 1

• 0

• 2

Practice exam problem for drawing: Which of the following compounds does not have unpaired electrons on the central atom?

• NH₃

• H₂O

• CH₄

• PH₃

Tags

NGSS.HS-PS1-2

Which of the following is the correct Lewis structure of ethynol (C₂H₂O)?

• H – C = C = O – H

• H – C ≡ C – O – H

• H – C ≡ C = O – H

• H – C ≡ C = O – H

Which of the following compounds does not exhibit resonance?

• CH₄

• O₃

• NO₃⁻

• CO₃²⁻

Which of the following molecular geometries is not associated with an expanded valence?

• Trigonal pyramidal

• Seesaw

• Linear

• Octahedral

What is the number of electrons around the central atom in XeF₄?

• 10

• 4

• 8

• 12

In which of the following are the bond angles most distorted by unbonded electron pairs?

• NH₃

• O₃

• SCl₄

• H₂O

For which of the following compounds is the electronic geometry not the same as the molecular geometry?

• BeCl₂

• BH₃

• CH₄

• SF₄

Which of the following compounds has a molecular geometry that is different from the others?

• BeCl₂

• O₃

• I₃⁻

• CO₂