Double and Triple Bonds Worksheet

Question 1

How many shared electron pairs are between the atoms in C≡C?

1. 1
2. 2
3. 3
4. 6

Question 2

In O=C=O, count the shared electron pairs around carbon and the shared electrons in those pairs.

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Question 3

Which symbol represents the carbon–carbon bond in H₂C=CH₂?

1. A single line
2. Two lines
3. Three lines
4. Four lines

Question 4

A draft of a neutral two-carbon molecule shows a C≡C bond and two single bonds from each carbon to hydrogen. Explain why this model needs a correction.

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Question 5

Which molecular formula matches the ethyne model?

1. C₂H₂
2. C₂H₄
3. C₂H₆
4. CH₄

Question 6

Describe how the total number of hydrogen atoms changes from ethane to ethene to ethyne. Relate this change to the C–C bond order.

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Question 7

How many shared electron pairs are in the entire ethene molecule? Count the C–C and C–H bonds separately.

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Question 8

Which change converts the ethyne model to the ethene model?

1. Replace the C≡C bond with C=C and add one H to each C.
2. Replace the C≡C bond with C–C and remove one H from each C.
3. Keep the C≡C bond and add two H atoms to one C.
4. Remove both H atoms and keep the C≡C bond.