Chapter 3 Multiple-choice questions

. Which of the following is a noble gas configuration?

1s² 2s²

1s² 2s² 2p⁶

1s² 2s² 2p⁶ 3s²

1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰

. Which of the following statements regarding carbon is incorrect?

A single atom of carbon can participate in two double bonds

A single atom of carbon can participate in three single bonds and one double bond

A single atom of carbon can participate in four single bonds

A single atom of carbon can participate in two single bonds and one double bond

. How many types of molecular orbital are there?

1

2

3

4

. Which of the following is a non-polar bond?

C-H

C=O

N-H

C-C

. Which of the following bonds is most strongly polarized?

C-H

C=O

N-H

C-N

. Atoms of two elements that exhibit similar electronegativities are most likely to undergo covalent bonding. True or false?

True

False

. Which of the following puts the elements in the right order in terms of their valency, starting with the element of lowest valency?

O, C, N, H

C, O, N, H

H, C, O, N

H, O, N, C

C, N, O, H

. What is the correct molecular formula for a compound containing nine hydrogen atoms, three carbon atoms, one oxygen atom, and one nitrogen atom?

C₃H₉ON

H₉C₃ON

C₃H₉NO

C₃H₉N₁O₁

C₃H₉O₁N₁

. A non-bonding orbital can contain a maximum of how many electrons?

0

1

2

. Which of the following statements regarding a conjugated system is false?

Electrons are shared between more than two atoms, rather than being localized within bond joining two specific atoms

The molecule must be cyclic (ring-structured)

The molecule must feature alternating single and double bonds

The system arises from the overlap of neighbouring p orbitals

. In a C-O bond, the distribution of electrons is skewed towards the carbon atom. True or false?

True

False

. Potassium and bromine are found in period 4 of the periodic table. Potassium is a group 1 element, while bromine is in group 17. Which element is likely to exhibit the greatest electronegativity?

Potassium

Bromine

. Which one of the following pairs of elements are most likely to exhibit ionic bonding?

C, N

N, O

H, C

O, Na

O, O

. Which of the following is the correct chemical formula for magnesium bromide?

MgBr

Mg₁Br₁

Mg₁Br₂

MgBr₂

Mg₂Br

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