Tiêu đề 1.Carbonyl Compounds (Pass.Q.).pdf ✅

CHEMISTRY Passage - 1 : (Q. 1 to 3) Reimer-Tiemann reaction introduces an aldehyde group on to the aromatic ring of phenol. The general method for producing substituted salicylaldehydes is : CH3 OH [I] Intermediate CH3 O – Na+ CHO CH3 OH CHO Q.1 Which of following reagents can be used in the above reaction ? (A) aq. CH3ONa + CHCl3 (B) aq. NaOH + CH2Cl2 (C) aq. NaOH + CHClBrF (D) aq. NaOH + CCl2Br2 [C] Q.2 The number of carbonyl compounds formed as products in the reaction given above is/are – (A) 1 (B) 2 (C) 3 (D) 4 [B] Q.3 If reagent is used as in Q.18, then the structure of intermediate I is – (A) CH3 O – Na+ CH2Cl (B) CH3 O – Na+ CHCl2 (C) CH3 O – Na+ CHBr2 (D) CH3 O – Na+ CHClF [D]