NEETChemistryGeneral Organic Chemistry
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Halogens present in an organic compound cannot be detected by directly adding aqueous silver nitrate solution to the compound. Reason (R): The elements in organic compounds are covalently bonded and do not furnish free ions in aqueous solution. In the light of the above statements, choose the most
Options
- ABoth (A) and (R) are true but (R) is not the correct explanation of (A)
- BBoth (A) and (R) are true and (R) is the correct explanation of (A)
- C(A) is true but (R) is false
- D(A) is false but (R) is true
Correct answer
B. Both (A) and (R) are true and (R) is the correct explanation of (A)
Step-by-step solution
Organic compounds generally contain elements like halogens in covalently bonded states. Because they are covalent, they do not ionise in aqueous solutions to furnish free halide ions ( X ^- ). Aqueous silver nitrate ( AgNO ₃ ) reacts only with free halide ions to form a precipitate of silver halide ( AgX ). Since direct addition of AgNO ₃ to the organic compound does not provide free halide ions, no precipitate is formed, and the halogens cannot be detected directly. Therefore, both Assertion (A) and Reason (R) are