Q.1
Which is the suitable catalyst for bringing out the transformation given below?
Questionorganic-chemistry-questions-answers1.jpg
  • a) BF3. Et20
  • b) NaOEt
  • c) tungsten lamp
  • d) dibenzoyl peroxide
Q.2
Which of the will give effective reduction of 3-hexyne to trans-3-hexene?
  • a) H2/Lindlar’s catalyst
  • b) Na/liq. NH3
  • c) Fe/NaCl
  • d) DIBAL
Q.3
Which of the reagent will give effective transformation of given compounds?
Questionorganic-chemistry-questions-answers3.jpg
  • a) CH2N2
  • b) CH3Li
  • c) (CH3)2CuLi
  • d) Ph3P = CH2
Q.4
Which is the mildest reducing agent which reduces only carbonyl group in presence of nitro, carboxyl, double bond and ester groups?
  • a) LiAIH4
  • b) Na-NH3
  • c) NaBH4
  • d) H2-Ni
Q.5
What will be the product for the given reactant and reagents?
Questionorganic-chemistry-questions-answers5.jpg
  • a)
  • b)
  • c)
  • d)
Q.6
Which is the correct combination of reagent which can carry out following conversion?
Questionorganic-chemistry-questions-answers6.jpg
  • a) (i) CH3 – MgBr then H+ (ii) H2S04 / ∆ (iii) NH2 – NH2 / KOH
  • b) (i) (CH3)2 CuLi then H+ (ii) NaBH4 EtOH (iii) H2S04 / ∆
  • c) (i) CH3 – Li, then H+ (ii) PCC / ∆
  • d) (i) NaBH4 ∙ CeCl3 then H+ (ii) MnO2 (iii) CH3 – Li
Q.7
How acetophenone can be converted to phenol by reaction?
  • a) m-CPBA followed by base catalysed hydrolysis
  • b) conc. HN03
  • c) iodine and NaOH
  • d) Singlet oxygen followed by base catalysed hydrolysis product
Q.8
How can we prepare RR’ R” OH by the action of excess of a suitable Grignard reagent on which of the following reactants?
  • a) nitrile or an aldehyde
  • b) ester or an alcohol
  • c) aldehyde or a ketone
  • d) ketone or an ester
Q.9
What is used to carry out the following conversion?
Questionorganic-chemistry-questions-answers9.jpg
  • a) hydroboration oxidation followed by Jones oxidation
  • b) Wacker oxidation followed by haloform reaction
  • c) oxymercuration-determination followed by Jones oxidation
  • d) ozonolysis followed by haloform reaction
Q.10
How many isomers of C4Hwhen reacts with CH3MgBr followed by acidification to alcohol (only consider carbonyl isomers and Including stereoisomers)?
  • a) 2
  • b) 3
  • c) 4
  • d) 5
0 h : 0 m : 1 s