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- 4) Predict the mechanism and the reactants to synthesize the following: А. В. C. t :0: וס: :CI:Arrange the following in increasing reactivity towards nucleophilic addition. O₂N- Select one: O a. O b. OC O d. II, I, III, IV I, II, III, IV II, I, IV, III I, II, IV, III HO₂S I E Br = IV H37- The Sulphonation of benzene ring proceeds by using . ???? SO,H (A) Conc.HNO3 and conc. H2S04 (C) Conc. H2SO4 (B) Dil. H2SO4 (D) SO3/ H2SO4 38- Which of the following benzene derivative is the most reactive and ortho, para director? CHO NH. (A) (B) (C) (D) 39- What is the major product for the following reaction? NO, HNO, ???? H,SO, NO, NO, NO, NO (A) NO, (B) NO, (D) None of these 40- a – D - glucose differ from B-D-glucose (A) Because they are anomer (B) Because they are enantiomers (C) Because they are mirror image of each other (D) Because they are geometrical isomers 41-Ninhydrin test is given by (C) Proteins (D) Carbohydrates (B) Alcohols (A) Alkynes 42- Which test of the following can distinguish between 1°, 2° and 3° amines : (C) Acidic Test (D) None (B) Tolen's Test (A) The Hinsberg Test 43- How many a – amino acid are there in animal protein : (D) 10 (B) 20 (C) 15 (A) 55
- B. Provide a reasonable mechanism for the non-enzymatic reaction below. :Ö NaOH / H₂O Ö:Predict the correct product from the reaction shown. (1) Hg(OAc); THF, HO (1) (2) NaBH, HO (2) HO HO Compound (3) a. b. Compound (1) Compound (4) C. Compound (2) d.Write the missing product or reagent in each of the following: En0; Eno CO₂Me OH I ?????? OTT 1) p Ts OH (cat.), Me OH CH₂Cl₂,rt. 2 h (98%yield) 2) 1) NaBH4 2) NH₂Cl(aq) 3) NaI0, Bu NBT (COCI), DMSO E₂N, -78°C ACO OAC I-OAC 0 LCHO
- Explain why each reaction below does not proceed as written. Provide the structure of the correct product if there is any. 1. LDA THF, -78 °C 2. а. 1. NaOEt НOE 2. Br b.1. Propose a plausible mechanism for the following reactions: a. b. OH X앳 HO. HCl (xs) A 2eq-2. Use mechanisms to predict the products of the following reactions: a. b. C. d. e. N CHO NaBH4 EtOH H 1) LIAIH4, Et₂O 2) NaOH, H₂O KCN, HCI 1) LIAIH4 2) NaOH, H₂O (A), 1111 NaCN, HCI