Nature of the C-X bond and nomenclature — NEET & JEE Questions

Question 1 · difficulty L1 · recall

In a carbon-halogen bond C-X, the bond is polar mainly because

• A. halogens are more electronegative than carbon
• B. carbon and halogen have identical electronegativity
• C. the bond is purely ionic
• D. carbon always carries a full negative charge

Question 2 · difficulty L2 · understanding

Which C-X bond is generally strongest among methyl halides?

• A. C-F
• B. C-Cl
• C. C-Br
• D. C-I

Question 3 · difficulty L2 · understanding

Which C-X bond generally has the greatest bond length?

• A. C-I
• B. C-F
• C. C-Cl
• D. C-Br

Question 4 · difficulty L2 · understanding

In IUPAC nomenclature, a halogen substituent is named using prefixes such as

• A. fluoro-, chloro-, bromo-, iodo-
• B. fluoride-, chloride-, bromide-, iodide- only
• C. halo- only
• D. amine-

Question 5 · difficulty L3 · application

What is the IUPAC name of $CH_3CH_2Cl$?

• A. Chloroethane
• B. Chloromethane
• C. 1-Chloromethane
• D. Dichloroethane

Question 6 · difficulty L3 · application

What is the IUPAC name of $CH_3CHBrCH_3$?

• A. 2-Bromopropane
• B. 1-Bromopropane
• C. Bromoethane
• D. 3-Bromopropane

Question 7 · difficulty L3 · application

Which bond is expected to break most readily in a simple haloalkane substitution, all else comparable?

• A. C-I
• B. C-F
• C. C-Cl
• D. All C-X bonds are identical

Question 8 · difficulty L3 · application

What is the IUPAC name of $CH_2ClCH_2CH_3$?

• A. 1-Chloropropane
• B. 2-Chloropropane
• C. 3-Chloropropane
• D. Chloroethane

Question 9 · difficulty L4 · application

Which order of C-X bond strength is generally correct?

• A. C-F > C-Cl > C-Br > C-I
• B. C-I > C-Br > C-Cl > C-F
• C. C-Cl > C-F > C-I > C-Br
• D. All are equal

Question 10 · difficulty L4 · application

Why is the carbon atom in a haloalkane susceptible to nucleophilic attack?

• A. The polar C-X bond leaves carbon partially positive
• B. Carbon carries a full negative charge
• C. Halogen donates all bonding electrons to carbon
• D. The C-X bond is nonpolar