Organic Chemistry Questions and Answers – Reagents in Organic Chemistry | Organic Chemistry Multiple Choice Questions and Answers

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Questions
1 Which is the suitable catalyst for bringing out the transformation given below?

Organic Chemistry

A BF3. Et20
B NaOEt
C tungsten lamp
D dibenzoyl peroxide

Answer: BF3. Et20
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

Answer: Na/liq. NH3
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3 Which of the reagent will give effective transformation of given compounds?

Organic Chemistry

A

CH2N2

B CH3Li
C (CH3)2CuLi
D Ph3P = CH2

Answer: Ph3P = CH2
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

Answer: NaBH4
5 What will be the product for the given reactant and reagents?

Oraganic Chemistry MCQ

Oraganic Chemistry MCQ

A (a)
B (b)
C (c)
D (d)

Answer: (c)
6 Which is the correct combination of reagent which can carry out following conversion?

Organic Chemistry

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

Answer: (i) CH3 – Li, then H+ (ii) PCC / ∆
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

Answer: m-CPBA followed by base catalysed hydrolysis
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

Answer: nitrile or an aldehyde
9 What is used to carry out the following conversion? Organic Chemistry MCQ
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

Answer: Wacker oxidation followed by haloform reaction
10 How many isomers of C4H8O when reacts with CH3MgBr followed by acidification to alcohol (only consider carbonyl isomers and Including stereoisomers)?
A 2
B 3
C 4
D 5

Answer: 2

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