Which of the following radicals is the most stable one? Which or the following s

Question

Which of the following radicals is the most stable one? Which or the following sets of reagents can be used to bring about the transformation shown? A. H_2 O, H_3 O^+ B. Hg (OAc)_2, H_2 O; then NaBH_4, NaOH C. CrO_3. H_2 SO_4 D. BH_3 THF; then H_2 O_2, NaOH Which of the following about the SNl is false? a) the reaction is favored with good leaving group c) there is no stereochemistry involved d) the reaction is favored with strong nucleophile e) there may be a rearrangement Which of the following is the best nucleophile? a) water b) NaOH c) acetic acid d)CH_3 OH 3)NH)3 Markovnikov addition of HCl to propene involves: (A) initial attack by a chloride ion. (B) initial attack by a chlorine atom. (C) isomerization of 1-chloropropane. (D) formation of a 1-propyl cation (CH_3 CH_2 CH_2^+) (E) formation of an isopropyl cation ((CH_3)_2 CH^+)

Explanation / Answer

(6)

Stability of free redicals is, tertiary free radical > secondary free radical > primary free radical

So, (B) is more stable

(7) (B)

(8) (C) The reaction is favoured with strong nucleophile

(9) (D) CH3OH

(10) (E) Formation of isopropyl cation

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