NEETChemistryHaloalkanes and Haloarenes
Match List-I with List-II. List-I (Reactions) List-II (Major Products) (A) CH₃Br + KCN (I) CH₃NC (B) CH₃Br + AgCN (II) CH₃NO₂ (C) CH₃Br + KNO₂ (III) CH₃CN (D) CH₃Br + AgNO₂ (IV) CH₃ONO Choose the correct answer from the options given below:
Options
- A(A)-(I), (B)-(III), (C)-(IV), (D)-(II)
- B(A)-(III), (B)-(I), (C)-(IV), (D)-(II)
- C(A)-(III), (B)-(I), (C)-(II), (D)-(IV)
- D(A)-(I), (B)-(III), (C)-(II), (D)-(IV)
Correct answer
B. (A)-(III), (B)-(I), (C)-(IV), (D)-(II)
Step-by-step solution
KCN is predominantly ionic and provides cyanide ions in solution. Attack takes place mainly through the carbon atom, yielding alkyl cyanides as the major product. Thus, CH₃Br + KCN CH₃CN . AgCN is mainly covalent, so nitrogen is free to donate an electron pair, forming isocyanides. Thus, CH₃Br + AgCN CH₃NC . Similarly, KNO₂ is an ionic compound and provides nitrite ions where oxygen acts as the donor atom, yielding alkyl nitrites. Thus, CH₃Br + KNO₂ CH₃ONO . AgNO₂ is covalent, so the attack occurs through the nitro