Question 1

Which of the following statements correctly describes a triple bond in a molecule?

Accepted Answer

A triple bond consists of three electron pairs shared between two atoms.

Question 2

In the molecule C$$_2H$_2N$$, how many single, double, and triple bonds are present?

Accepted Answer

4 single bonds, 1 double bond, 1 triple bond

Question 3

Which bond type has the shortest bond length?

Accepted Answer

Triple bond

Question 4

How many electrons are shared in a double bond?

Accepted Answer

$$4$$ electrons

Question 5

Which of the following molecules contains a triple bond?

Accepted Answer

HCN

Question 6

Given the Lewis structure for ethene (C$$_2H$_4$$), how many double bonds are present?

Accepted Answer

1

Question 7

Which of the following is the correct representation for a single bond between two carbon atoms?

Accepted Answer

$$\mathrm{C} - \mathrm{C}$$

Question 8

If a molecule has the formula C$$_2H$_2$$, what type of bond connects the two carbon atoms?

Accepted Answer

Triple bond

Question 9

Which of the following best explains why multiple bonds (double or triple) are sometimes necessary in Lewis structures?

Accepted Answer

To satisfy the octet rule for all atoms in the molecule

Question 10

In the molecule CO$$_2$$, what type of bonds are present between the carbon and oxygen atoms?

Accepted Answer

Double bonds

Question 11

Which of the following molecules contains only single bonds?

Accepted Answer

CH$$_4$$

Question 12

How many electron pairs are shared in a triple bond?

Accepted Answer

$$3$$ electron pairs

Question 13

Which of the following is the correct Lewis structure for the bond between carbon and nitrogen in HCN?

Accepted Answer

$$\mathrm{C} \equiv \mathrm{N}$$

Question 14

A molecule has the following structure: H–C≡C–H. How many total bonds are present in the molecule?

Accepted Answer

3 single bonds and 1 triple bond

Question 15

Which of the following is true about the bond strength of single, double, and triple bonds?

Accepted Answer

Triple bonds are the strongest, followed by double, then single bonds.

Question 16

Which molecule would require the use of a double bond in its Lewis structure to satisfy the octet rule?

Accepted Answer

CO$$_2$$

Question 17

If a molecule contains a carbon-carbon triple bond, what is the total number of electrons shared between the two carbon atoms?

Accepted Answer

$$6$$ electrons

Question 18

Which of the following best describes the difference between a single and a double bond?

Accepted Answer

A single bond shares 2 electrons, while a double bond shares 4 electrons.

Question 19

Which of the following molecules contains both a double and a triple bond?

Accepted Answer

C$$_2H$_2N$$

Question 20

A student draws a Lewis structure for C$$_2H$_4$$ and shows a triple bond between the two carbon atoms. What is the error in this structure?

Accepted Answer

C$$_2H$_4$$ should have a double bond between the carbon atoms, not a triple bond.

Understanding Multiple Bonds in Lewis Structures

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