Haloalkanes MCQs-Part I

 Haloalkanes MCQ's For NEET  Series -I 

1. In the displacement rxn. RI + MF =>  RF +MI. The rxn will be most favourable if M happens to be

 A) Li           

 B) Na          

 C) K              

D) Rb

2. The major product formed when 2Methylbut-1-ene reacts with HBr?

     A) 2-Bromo-3-methylbutane

     B) 2-Methyl-3-bromobutane

     C) 2-Bromo-2methylbutane        

     D) NOTA

3.  1,4-dimethylcyclohexane on chlorination gives ---monochorination products

  A) 1         

 B) 5           

  C) 3         

  D) NOTA

4. Which of the following is correct statement

    A) Reactivity order of Halides for dehydro-  halogenation is RI>RBr>RCl>RF

   B) Reactivity order of Halogens & alkanes  for halogenations of alkanes F2>Cl2>Br2>I2  & t>s>p respectively

   C) Reactivity order of Alcohols & HX in reaction of ROH with HX is – t>s>p & HI>HBr>HCl respectively

   D) All of the Above

5. Which of the following compound is not chiral ?

     A) CH₃CHDCH₂Cl                       

  B) 2-Butanol

    C) 2-Hydroxypropanoic acid 

   D) DCH₂CH₂CH₂Cl

6. Ethylchloride  is converted into diethylether by

A) Groove’s reaction  

   B) Tilden Reagent

C) Grignard reaction    

  D) Williamson’s synthesis

7. Consider the reactions

   I) (CH₃)₂CH-CH₂Br + C₂H₅-OH => (CH₃)₂CH-CH₂OC₂H₅     + HBr

   II) (CH₃)₂CH-CH₂Br + C₂H₅O^-  => (CH₃)₂CH-CH₂-O-C₂H₅ + Br^-

The mechanism of rxn (I) & (II) are respt.

    A) SN1 & SN2               B) SN1 & SN1

    C) SN2 & SN2               D) SN2 & SN1

8.Which one of the following is most reactive towards SN1 rxn?

    A) C₆H₅CH(C₆H₅)Br        

   B) C₆H₅CH(CH₃)Br

   C) C₆H₅C(CH₃) (C₆H₅)Br   

    D) C₆H₅CH₂Br 

9. What is IUPAC name of Westrosol( Cl₂C=CHCl) & Westron( CHCl₂-CHCl₂) respectively

A)  1,1,2-trichloroethene ; 1,1,2,2-tetrachloroethane

B) 1,1,1-trichloroethane & 1,1,1,1-tetrachloroethane

C) Tetrachloroethene & Trichloroethane

D) NOTA

10. Which of the following dipole moment order is correct ?

A) CH3Cl>CH3F>CH3Br> CH3I

B) CH3Cl>CH2Cl2>CHCl3>CCl4

C) O-dichlorobenzene(ODCB) > MDCB > PDCB

D) All of the Above

11. Which of the following statement is incorrect ?

A) RCOOAg + Br2 => RBr + CO2 + AgBr

B) Rxn A is Called Borodine-Hunsdieckar rxn

C) Rxn A operates via Free radical Mechanism

D) Rxn A  Reduces one carbon atom Number

E) Yield of RBr decreases as t>s>p

12. CH₃-CH=CH₂ reacts with I) NBS & II) HCl-H2O2 gives respt.

  A) Br-CH2-CH=CH2    & CH3-CH2-CH2Cl

  B) Br-CH2-CH=CH2    & CH3-CHCl-CH3

  C) CH3-CHBr-CH3      &    CH3-CHCl-CH3

  D) NOTA

13. CH₃-CH₂-CH₂Cl reacts with I) Alc.KOH or NaNH₂ II) Aq. KOH form ….& … respectively

   A)ROH & alkene     

  B) RX & Alcohol

   C) alkene & ROH     

  D) All are possible

14. RX reacts with I) AgNO₂  & II) NaNO₂ form --&---

   A) RNO2  & RONO    

  B) RNO2 only

  C) RONO Only           

  D) RONO & RNO2

15. Which of the following is incorrect reaction?

A)2 RX + 2Na /dryether => RR + 2NaX

B) 4EtCl + 4Na/Pb =>(Et)4Pb + 4NaCl + 3Pb

C) RX + Mg/dryether => RMgX

D) 2EtBr + Zn => Butane + ZnBr2

16. What is major Hoffmann product of reaction

CH3-CH(Br) CH2-CH3 + EtOH-KOH=>

A) CH3CH(OH)CH2-CH3

B) CH3CH2-CH2-CH3

C) CH2=CH-CH2-CH3

D) CH3-CH=CH-CH3

17. Which of the following compound do not give Haloform test Positive

A) CH3-CO-COOH            

  B) CH3-CH2-OH   

 C) CH3-CO-CHO               

  D) CH3-CO-OH

18. A yellow Product is formed when an organic compound C3H8O is warmed with aq. Na2CO3 & I2 solution. The product is

A) CHI3  

B) NaI  

C) NaIO3 

D) Adduct of NaI & C3H8O

19.Identify Z in the following series

EtI + Alc. KOH=>X   ; X + Br2=>Y ;   Y + KCN=> Z

A) EtCN     

B) EtNC    

C) NC-CH2-CH2-CN 

D) NOTA

20. The Order of SN2 reaction in RX is

A) RF>RCl>RBr>RI   

  B) RI>RBr>RCl>RF

C) RCl>RF>RBr>RI    

D) RF>RBr.>RCl>RI

21. Which of the following is correctly matched or related :-

A) COCl2- Phosgene gas          

  B) Cl3C-CHO - Chloral

C) Gammexane- 666 or BHC    

  D) DDT- C₁₄H₉Cl₅

E) Pyrene- CCl4                              

F) All of the Above

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