C) II > III >V>I>IV D) III > II > IV>I> V E) II > III > IV>I> V 3. For the quali
ID: 567250 • Letter: C
Question
C) II > III >V>I>IV D) III > II > IV>I> V E) II > III > IV>I> V 3. For the qualitative analysis experiment which of the following statements is false? A. Limonene reacts with 2 equivalents of Br2/CH2Cl2 reagent. B. Trityl chloride gives positive Nallacetone and AgNO3/EtOH tests. C. Citral reacts with 2,4-DNP, Tollen’s reagent and Br2/CH2Cl2 reagent. D. a-Terpineol reacts with both Br/CH2Cl2 and Lucas reagents. E. Yellow azo dye forms a colorful complex with aqueous FeCl3 solution. F. Vanillin gives positive FeCl3, 2,4-DNP and Tollen's tests. PhCH,CI 4. Which one of the following reacts the fastest with AgNO3/EtOH? Ph2CHCI PhCI PHCH=CHCI 5. Which one of the following reagents is not corrosive? sulfuric acid phenol ethyl acetate A B bromine Sodi AExplanation / Answer
3) b) trityl chloride gives postive NaI/acetone and AgNO3/EtOH tests.
this statement is false.
Because trityl chloride can't give the positive test with NaI/acetone.
Trityle chloride is sterically hindered alkyl halide as methyl carbon is attached to three bulky phenyl group. So NaI/acetone reagent can react with primary and secondary alkyl chloride via SN2 mechanism to produce alkyl halide. It can't react with tertiary alkyl halides as the carbon is hindered by three other bulky groups.
But trityl chloride can form teriary carbocation and chloride ion and it will give positive test with AgNO3/EtOH.
4) The compound which can produce chloride ion easily can react rapidly with AgNO3/EtOH.
alkyl halide which can produce most stable carbocation can give chloride ion easily.
Among the given compounds compound A diphenylmethyl chloride can produce most stable carbocation. So it will react rapidly with AgNO3/EtOH
Ph2CHCl ----------> Ph2CH+ +Cl^-
AgNO3 + Cl^- ------------> AgCl (s) white precipitate.
Ph2CH^+ will have more number of resonance structures so it is more stable than the carbocations produced by other compounds.
Answer is A) Ph2CHCl
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