Question 1

Which of the following statements best describes the relationship between bond length and bond strength for covalent bonds?

Accepted Answer

The shorter the bond, the stronger the bond.

Question 2

Given the following bonds: $$\mathrm{C-C}$$, $$\mathrm{C=C}$$, and $$\mathrm{C\equiv C}$$, which has the highest bond energy?

Accepted Answer

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

Question 3

Which bond type has the shortest bond length?

Accepted Answer

Triple bond

Question 4

If a molecule contains a $$\mathrm{N\equiv N}$$ bond, what can you infer about its bond energy and bond length compared to a $$\mathrm{N=N}$$ bond?

Accepted Answer

It has higher bond energy and shorter bond length.

Question 5

Which of the following best explains why a triple bond is stronger than a single bond?

Accepted Answer

Triple bonds involve more shared electrons, increasing the attraction between atoms.

Question 6

A chemist compares the bond energies of $$\mathrm{O_2$} ($$double bond) and $$\mathrm{N_2$} ($$triple bond). Which statement is correct?

Accepted Answer

$$\mathrm{N_2$}$$ has a higher bond energy than $$\mathrm{O_2$}.$$

Question 7

Which of the following molecules contains the strongest covalent bond?

Accepted Answer

$$\mathrm{N_2$}$$

Question 8

Which of the following is true about the bond order and bond strength?

Accepted Answer

Higher bond order means stronger bond.

Question 9

A student claims that all covalent bonds between the same two elements have the same strength. Which example disproves this claim?

Accepted Answer

$$\mathrm{C-C} vs$$ $$\mathrm{C\equiv C}$$

Question 10

Which of the following best describes the trend in bond length as the number of bonds between two atoms increases?

Accepted Answer

Bond length decreases.

Question 11

Which bond would require the most energy to break?

Accepted Answer

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

Question 12

In a chemical reaction, which bond is most likely to remain intact under the same conditions: $$\mathrm{C-C}$$, $$\mathrm{C=C}$$, or $$\mathrm{C\equiv C}$$?

Accepted Answer

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

Question 13

Which of the following statements about bond energy is correct?

Accepted Answer

Bond energy is the energy required to break a bond.

Question 14

A molecule with a triple bond is most likely to have which of the following properties compared to a molecule with a single bond?

Accepted Answer

Shorter bond length and higher bond energy.

Question 15

Which of the following best explains why $$\mathrm{N_2$} is a $$very stable molecule?

Accepted Answer

It has a triple bond, which is very strong.

Chemical Bonding: Multiple Bonds, Bond Length, and Bond Energy

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