Which of the following reacts fastest with NaOH in ethanol by S_N 2 mechanism. C

Question

Which of the following reacts fastest with NaOH in ethanol by S_N 2 mechanism. CH_3 Cl CH_3 Br CH_3 I CH_3 CH_2 Cl CH_3 CH_2 I Which of the following reagent(s) can be used to prepare benzoic acid (Ph-CO_2 H) from toluene? Fe/H_2 SO_4 CH_3 COOH KMnO_4 NBS/H_2 O HNO_3/H_2 SO_4 Intermediate in the S_N 1 mechanism is a carbonium ion free-radical carbanion carbon with 5-bonds a primary carbon Transition state in the S_N 2 mechanism is a primary carbon free-radical carbonium ion carbon with 5-bonds carbanion Which of the following reagent(s) gives the reaction below CH_3 Br HBr Br_2/CCl_4 NBS/CCl_4 CH_3 Br/FeBr_5 Formula of aniline is: C_6 H_5 OH C_6 H_5 NH C_6 H_5 NH_2 C_6 H_5 NH_3 C_6 H_5 NO_2 The rate of S_N 1 reaction is proportional to: Base concentration RX concentration Nucleophile concentration RX and Nucleophile concentrations leaving group concentration The most likely mechanism for the reaction: S_N 1 S_N 2 E1 E2 E1_CB An allowed number of pi electrons for an aromatic compound is: 2 5 8 12 1 Which of the following is the best leaving group ? F- Cl- Br- I- -OH Which of the following reacts fastest with NaOH in water by S_N 1 mechanism. CH_3 Cl CH_3 Br CH_3 CH_2 CH_2 Br (CH_3)_2 CHBr (CH_3)_3 CBr Which of the following is the best solvent for S_N 1 mechanism ? CH_3 OH CHCl_3 CH_3 CH_2 CH_2 OH H_2 O CH_2 Cl_2 Which of the following reagent(s) can be used to prepare toluene from benzene CH_3 Cl/NBS CH_3 Br/FeBr_3 H_2 SO_4/CH_3 Cl CH_3 Cl AlCl_3 Which of the following functional groups are o, p-directing? NO_2, CH_3, OH Cl, NH_2, COOH I, SO_3 H, OH OCH_3, Cl, COCH_3 Which of the following is the electrophile in the Friedel-Craft acylation reaction RCO^+ RCO_2^+ CO_2^+ RX/H_2 SO_4 RCO_3^+

Explanation / Answer

Answer for question 1:-

CH3I size iodine is bigger than other halogen series and also less electronegative so its good leaving group so that the reaction accure very fast.

Answer for question 2:- preparation of benzoic acid from toulene we are going to use KMnO4

Answer for question 3:- the intermediate formed in SN1 reaction is carbocation.

Answer for question 4:- the intermediate formed in SN2 reaction is carbon with 5 bonds.

Answer for question 5:- NBS/CCl4. NBS is allylic brominating agent.

Answer for question 6:- C6H5NH2.

Answer for question 7:- Nucleophile concentration

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