IMPORTANT QUESTIONS
OF CHEMISTRY _CHAPTER_WISE #ORGANIC
Chapter – Haloalkanes
& Haloarenes 4 Marks
( JKBOSE- 2 Marks Questions *2 Questions ) – IMPORTANT
QUESTIONS ARE HIGHLIGHTED
DIRECT
QUESTIONS:-
Q1. Write two methods of
preparation of haloalkanes & Haloarenes.
Q2. Write two chemical
properties of haloalkanes
& haloarenes .
Q3. Write short notes
on :- I) Finkelstein Reaction & II) Swartz Reaction
Q4. Write chemical
reactions for I) Groove’s Process & II) Deacon Process
Q5. Write short notes
on I) Electrophilic Substitution reaction II) Nucleophilic reactions
Q6. What products are
formed when haloalalkanes reacts with
Na & Zn metals ( **Wurtz & Frankland reaction )
Q7. Write short notes
on I) Fittig Reaction II) Wurtz-Fittig reaction
Q8. Write short notes
on I) Ulmann reaction II) Formation of RMgx From RX
Q10. Write
Preparation & Properties of I) DDT
II) Chloroform
Q11. Write short
notes on- I) Holoform reaction II) Freons
Q12. Write mechanism of SN1 & SN2 reaction in Haloalkanes.
Q13. What are ambident Nucleophiles. Explain with two examples.
Q15. Give the uses of
Freon 12, DDT, CCl4 & CHI3.
Q16. How you can
prepare I) Westron ( CHCl2CHCl2)
& II) Westrosol ( CHCl=
CCl2). Also write their IUPAC names.
Q17. Write a short
note on –I) Satyzeff rule II) Dow’s Process
Q18. Write short
notes on _) Retention of Configuration
II) Inversion of Configuration
Q19. Prepare the
following –I) Phosgene from Chloroform
II) DDT from chlorobenzene & Chloral
Q20. Why aromatic
nucleophilic substitution reactions are not possible in haloarenes? If they do so only then in drastic consitions.
REASONING QUESTIONS :-
Q1. Explain why the
dipole moment of chlorobenzene is lower than that of cyclohexylchloride ?
Q2. Write the
mechanism of :- nBuBr + KCN +
(Et-OH-H2O) à n
BuCN
Q3. Explain why RX ,
though polar , are immiscible with water ?
Q4. Explain why RMgX should
be prepared under anhydrous conditions?
Q5. Explain why But-2-ene is more stable product of
elimination reaction of 2-chlorobutane with Alc. KOH ?
Q6. Which one the
following has the highest dipole moment ? Explain Why?
A) CH2Cl2 B)
CHCl3 C) CCl4
Q7. Which compound in each of the following pairs will react
faster in SN2 reaction with OH- & why?
A) CH3Br or CH3I
B) (CH3)3C-Cl or (CH3)2CH-Cl
C) CH3-CH(CH3)- CH2CH2-Br Or CH3CH2CH(CH3)-CH2-Br D)
C6H11-CH2-Cl Or C2H11-Cl
Q8. Why Iodobutane is
SN2 faster than Chlorobutane .
Q9. Haloalkanes react with KCN to form RCN as main product
while AgCN forms RNC as main product . Explain
Q10. Haloalkanes
react with Aq. KOH forms Alcohols while reacts with Alc. KOH forms alkenes.
Explain
Q11. Arrange the following compounds in order of their increasing B.pts:-
I) Bromomethane,
Bromoform , Chloromethane, Dibromomethane
II) 1-chloropropane , Isopropyl chloride, 1-chlorobutane
Q12. P-Isomer of
dichlorobenzene has highest melting & boiling point as compared to O -
& m- isomer of dichlorobenzne. Explain why ?
Q13. Why Sulphuric acid not used during the reaction of
alcohols with KI?
Q14. Identify the
isomer of alkane with MF- C5H12 that one
photochemical chlorination yields I) A
single monochloride II) Four isomeric
monochlorides
Q15. Although Cl is
an EWG , yet it is O/p- directing in ArSE reactions. Why?
Q16. Primary alkyl
halide C4H9Br (a) reacted with alcoholic KOH to give
compound (b).Compound (b) is reacted with HBr to give (c) which is an isomer of
(a). When (a) is reacted with sodium metal it gives compound (d), C8H18 which
is different from the compound formed when n-butyl bromide is
reacted with sodium. Give the structural formula of (a) and write the equations
for all the reactions.
Q17. Out of
C6H5CH2Cl and C6H5CHClC6H5, which is more easily hydrolysed by aq.KOH ?
Q18.
Predict all the alkenes that would be formed by dehydrohalogenation of
following halides with EtONa in EtOH & identify the major alkene- I) 2-chloro-2-methylbutane II)
2,2,3-trimethyl-3-bromopentane (HINT –
use -Satyzeff rule)
Q19. Write the equations for the preparation of
1-Iodobutane from –I) Butanol II) Butene
Q20. Why does NO2 group show its effect only at Ortho
& Para- positions & not at meta
position of Chlorobenzene?
