Class XII Chemistry Organic Compounds Containing Halogens 2

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Question 1

Bottles containing C₆H₅I and C₆H₅CH₂I lost their original lables. They were labelled A and B for testing A and B were separately taken in a test tub and boiled with NaOH solution. The end solution in each tube was made acidic with dilute HNO₃ and then some AgNO₃ solution was added. Substance B gave a yellow precipitate. Which one of the following statements is true for this experiment?

• AA was C₆H₅I
• BA was C₆H₅CH₂I
• CB was C₆H₅I
• DAddition of HNO₃ was unnecessary

Question 2

Identify `C’ in the following reaction sequence

• A
• B
• C
• D

Question 3

Which of the following reaction does not take place?

• A
• B + aQ.KOH →
• C + alc. KOH →
• D + NaOH

Question 4

m–Bromotoluene is prepared by –

• ABromination of toluene
• BFriedel Craft’s reaction of bromobenzene with CH₃Cl
• CBromination of nitrobenzene and subsequent replacement of –NO₂ group with methyl group
• DBromination of aceto–p–toluidine followed by hydrolysis and deamination

Question 5

^{Major product (P) in the following reaction is}
(P)

• A
• B
• C
• D

Question 6

Arrange the following compounds according to their relative reactivity with alcoholic AgNO₃ - t-Butyl chloride (I), sec-butyl chloride (II) and (III)

• AI > II > III
• BIII > II > I
• CII > I > III
• DII = III > I

Question 7

Recemic mixture is obtained due to halogenation of -

• An-pentane
• BIsopentane
• Cneopentane
• DBoth A & B

Question 8

Which of the following is the correct order of decreasing SN² reactivity?

• AR₃CX > R₂CHX > RCH₂X
• BR₂CHX > R₃CX > RCH₂X
• CRCH₂X > R₃CX > R₂CHX
• DRCH₂X > R₂CHX > R₃CX (X = a halogen)

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