Saturday, 5 February 2022
Friday, 4 February 2022
Important Questions on Alcohols, Phenols & ethers
Important Questions of – Alcohol , Phenols & Ether
( Chapter-11th ) 4marks
JKBOSE_ Pattern :- 2 Question = 1(VVSAQ or Fill-up or MCQ+ 3 SAQ marks)
Q1. Write the three methods of Preparation of Alcohols.
Q2. Write the three methods of Preparation of Phenols & Ethers.
Q3. Write the three chemical properties of alcohols & ethers
Q4. Write the three chemical properties of Ethers.
Q5. How alcohol( Methanol) reacts with –I) Na & NaOH II) PCl3 & PCl5 III) CH3COOH
Q6. How HI reacts with following ethers : -I) CH3-O-CH3 II) Tert. dibutyl ether III)Ethylmethylether
Q7. Write short notes on –I) Hydroboration reaction II) Reimer-Tiemann reaction III) Williamson’s ether synthesis
Q8. Write the chemical reactions for –I) Kolbe’s reaction II) Fermentation of carbohydrates III) Nitration of Phenols
Q9. Write short notes on I) Friedel Craft alkylation reaction of Anisole II) Friedel Craft aceylation of Phenol III) Halogenation of phenol
Q10. Convert the following :- I) Primary alcohol to carboxylic acid II) Benzyl alcohol to Benzonic acid II) Butan-2-one to butan-2-ol
Q11. Write the mechanism of hydration of ethene to yield ethanol.
Q12. Write the mechanism of conversion of ethanol to diethylether.
Q13. Give two reactions that show the acidic nature of Phenol. Compare acidity of phenol with that of ethanol
Q14. Explain why is o-nitrophenol more acidic than O-methoxyphenol ?
Q15. Write the mechanism of dehydration of ethanol to ethene.
Q16. Give the reason for the higher boiling point of ethanol in comparison to methoxymethane & ethane .
Q17. Why O-nitrophenol is steam volatile while P-nitrophenol is less steam volatile ?
Q18. How primary , secondary & tertiary alcohols are
distinguished?
Q19. What is victor Meyer & Lucas reagent test? Write chemical reactions to illustrate your answer.
Q20. Name the reagent involved in the following conversion:-
A) Ethanol to Ethanal B) Propan-2-ol to Acetone III) But-2-en-1-ol to But-2-enal
Q21. Write the IUPAC & chemical structure of –I) Picric acid II) Anisole III) 2-Ethoxy -3-methylpentane
Q22. Write short notes on –I)
Oxymercuration-demercuration
II) Coupling reaction
Q23. Arrange the following compounds in order of their increasing boiling points :-
Pentanol , butanol , Butan-2-ol , ethanol , Propanol & methanol
Q24. Illustrate with examples the limitations of williamson’s synthesis for the preparation of certain types of ethers.
Q25. How RMgX reacts with carbonyl compounds to give all types of alcohols?
Questions carrying 1
Mark
Q1. Phenols are also called as ………….
Q2. PCC is ----
Q3. Jones reagent consists of -------
Q4. The structure of PDC is --------
Q5. What is denatured alcohol?
Q6. How phenols are prepared from benzenediazonium chlorides?
Q7. Write chemical names of I) Catechol II) Resorcinol
Q8. What is formed by oxidation of phenols with Pot. Dichromate /sulphuric acid ?
Q9. How phenol is converted into Benzene ?
Q10. How salicylic acid is formed from Phenol ?
Q11. Name the reagent used in bromination of phenol to 2,4,6-tribromophenol
Q12. Write IUPAC name & chemical structure of I) Glycerol II) Isopropylalcohol
Q13. What is Lucas reagent ?
Q14. Phenols & aromatic ethers are o/p directing . ( True/false)
Q15. How salicylic acid reacts with Methanol ?
Thursday, 3 February 2022
IMPORTANT Questions on Haloalkanes & Haloarenes
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?
Haloalkanes & Haloarenes II
Haloalkanes & Haloarenes II Part I deals with RX & chloroform Part 2 deals with ArX & Dihalides + Properties of chloroform. ...