Physical Chemistry 1: Bonding multiple choice questions

1. Which of the following substances have covalent bonding?

HBr

NaBr

LiBr

KBr

Correct! Wrong!

2. Which of the following molecules is NOT an allotrope of Carbon?

C₆₀

C_(diamond)

C_(graphite)

CO₂

Correct! Wrong!

3. Chlorine pentafluoride has the formula ClF₅. How many bonding pairs and lone pairs are present in Chlorine pentafluoride?

5 bonding pairs 0 lone pairs

5 bonding pairs 1 lone pair

5 Bonding pairs 2 lone pairs

5 Bonding pairs, 0 lone pairs and 1 unpaired electron

Correct! Wrong!

4. Which of the following elements has the lowest electronegativity?

Ca

Si

N

P

Correct! Wrong!

5. Which Hydrogen Halide has the highest boiling point?

HI

HBr

HF

HCl

Correct! Wrong!

6. Dinitrogen Monoxide has the formula N2O. What is it’s shape?

Linear

Bent

Tetrahedral

Triangular pyramidal

Correct! Wrong!

7. Which of the following substances does NOT have a crystal structure?

I₂

NaCl

Cl₂

Na

Correct! Wrong!

8. Which if the following molecules is NOT polar?

SF₆

CHCl₃

SO₂

HCl

Correct! Wrong!

9. Predict the change in bond angle when the following reaction takes place:

H₂O + H⁺ → H₃O⁺

The bond angle increases from 104.5° to 107°

The bond angle decreases from 107° to 104.5°

The bond angle increases from 107° to 109.5°

The bond angle decreases from 109.5° to 107°

Correct! Wrong!

10. Barium Chloride has the formula BaCl₂. Which of the following statements about BaCl₂ is NOT correct?

BaCl₂ has a higher melting point than CsCl₂

BaCl₂has a lattice structure held together by strong electrostatic forces of attraction between Ba⁺ ions and Cl^-ions

BaCl²conducts electricity when molten

BaCl² has a lower melting point than SrCl₂

Correct! Wrong!

Gemma Shearer