question_answer

Direction: Question No. 51 is assertion reason type. These question contains two statements Statement I (Assertion), Statement II (Reason). These question also has four alternative choices, only one of which is correct. You have to select the correct choices from the codes (a), (b), (c) and (d) given below:

Statement I: Detection of chlorine in 2, 4, 6 -trinitrochlorobenzene can be done directly by addition of aq. \[AgN{{O}_{3}}\]solution.

Statement II: \[C-Cl\] bond is weakened by electron withdrawing - \[N{{O}_{2}}\] group.

 

A)  Statement I is true; Statement II is true; Statement II is not a correct explanation for Statement I.

B)  Statement I is true; Statement II is false.

C)  Statement I is false; Statement II is true.

D)  Statement I is true; Statement II is true; Statement II is not a correct explanation for Statement I.

Correct Answer: D

Solution :

2, 4, 6- trinitrochlorobenzene The presence of electron withdrawing group (like\[-N{{O}_{2}}\]) makes the nucleophilic aromatic substitution easier, as it decreases the strength of \[C-Cl\] bond. Thus, \[-Cl\] gives ppt. of \[AgCl\] with aq.\[AgN{{O}_{3}}\].