Haloalkanes & Haloarenes II
Part I deals with RX & chloroform
Part 2 deals with ArX & Dihalides + Properties of chloroform.
1. No precipitate is formed when chloroform reacts with …..This is because; being covalent CHCl3 can’t furnish Cl-1 ions
A) AgNO3
B) AgNO2
C) Blue Litmus
D) H2SO4
2. CHCl3 discovered by J.V.Liebig & named by J.B.Dumes. It’s anaesthetic nature was discovered by James Young. It is not used in
manufacture of …..directly
A) Chloropicrin
B) Phosgene
C) Chloretone
D) Salicylic Acid
3. CCl4 + 2HF=> CF2Cl2 + 2HCl .
The name of Freon formed is
A) Freon -12
B) Freon-11
C) Freon -10
D) NOTA
4. CH3-CHBr2 +2 KCN=> X ; X+ H20/H+ => Y ; Y on Heating gives …..by losing …..
A) Propanoic acid , CO2
B) Propanoic anhydride , H20
C) Propanoic acid , CO2
D) Propan-1,3-doic acid , CO2 , H2O
5. Which of the following is not suitable method for formation of Haloarenes?
A) From Benzene diazonium Chloride Or
Sandmeyer’s reaction
B) Gattermann Halogenation reaction
C) From rxn of Benzene + HCl + ½ O2
(commercially or Raschig Method)
D) From reaction Phenol with NaCl
6. Which of the statement is correct:-
A) In Sandmeyer’s reaction Cu shuttles from +1 to +2 state & source of X is from CuX
B) In Gattermann reaction Cu shuttles from 0 to +1 & source of X is HX.
C) Florobenzene is prepared via Balz-Schiemann reaction
D) Iodobenzene is prepared by reaction of BD salts with KI & warming the mixture
E) All of the Above
7. Identify the reaction that involves
Isocynanide test or test for 1o
amines
A) Phenol + CHCl3 + Aq.KOH => Salicyaldehyde
B) Phenol + CCl4 + Aq. KOH => Salicylic acid
C) Ph-NH2 + CHCl3 + KOH => Ph-NC + KCl + H2O
D) NOTA
8. DDT is formed by reaction of ------& ----- in presence of Conc. Sulphuric acid
A) 1,1,1-trichloroethanal & Chlorobenzene
B) Chloropicrin & Chlorobenzene
C) Phosgene & Chlorobenzene
D) NOTA
9. Perflorocarbons(PFCs) have general formula
A) CnF2n+2
B) CnH2n+2
C) CnCl2n+F
D) NOTA
10. The pesticide DDT slowly changes to
A) p,p’-dichlorodiphenyldichloroethene
B) p,p’-dichlorodiphenyldichloroethane
C) p,p’-dichlorodiphenylethene
D) CCl3-CHO & Chlorobenzene
11. Toluene when treated with Br2 & Fe , gives p-bromotoluene as the main product , because the methyl group
A) Is O/P directing group & EDW
B) is meta-directing group
C) Activates ring by hyperconjugation
D) Deactivates ring by of the above
1) A, C. 2) A,B,C 3) A,B 4) A only
12. ArX are less reactive towards SN reactions as compared to RX due to
A) Formation of less stable carbonium ion
B) Resonance stabilization
C) Longer C-X bond
D) I-effect
E) Sp2 Hybd. C attached to X
1) A,B,C 2) B,D,E 3)B,E D) D,E
13. Which of the following is most reactive towards SN reactions
A) 2,4,6-Trinitrochlorobenzene
B) 2,4-Dinitrochlorobenzene
C) P-nitrochlorobenzene
D) m-nitrochlorobenzene
14. The Electrophile source used in Friedal craft Acylation of Haloarenes is
A) RCOCl
B) (RCO)2O & RCOCl
C) RCl
D) All of the Above
15. Step I- CH3CH2-OH + Cl2 => CH3CHO
Step II- CH3CHO + 3Cl =>CCl3-CHO
In above reaction, the role of Cl2 in step I & II respectively is
A) Oxid. & Chlorination
B) Red. & chlorination
C) Oxid. & Hydrolysis
D) Chlorination
16. O-Methoxybromobenzene is treated with NaNH2 & then with NH3. The product formed is
A) O-Methoxyaniline
B) Aniline
C) Methoxybenzene
D) m-methoxyaniline
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