23. Which of the following compound is the most reactive toward nucleophilic ar sromatic substitution? (A) 4-fluoro-1,2-dinitrobenzene (B)1-luoro-2,4-dinitrobenzene (C) 2-luoronitrobenzne (D) no reaction for all above answers

2. How many of the following statements is/are correct? (I) Gauche form is the most stable conformer of butane. (II) In cyclopropane, the maximum electron density between two carbon atoms corresponds to the internuclear axis. (III) According to Bacyer strain theory, cyclopentane has greater angle strain than cyclohexane. (A)0(B)1 (C)2 (D)3

23. Which of the following compound is the most reactive toward nucleophilic ar sromatic substitution?
(A) 4-fluoro-1,2-dinitrobenzene
(B)1-luoro-2,4-dinitrobenzene
(C) 2-luoronitrobenzne
(D) no reaction for all above answers

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