Chemistry : Organic Chemistry – Some Basic Principles and Techniques

Dehydrohalogenation of an alkyl halide is a/an

• nucleophilic substitution reaction

• elimination reaction

• both nucleophilic substitution and elimination reaction

• rearrangement

The correct structure of 4-bromo-3-methyl but-1-ene is

• Br-CH=C(CH₃)₂

• CH₂=CH-CH(CH₃)-CH₂Br

• CH₂=C(CH₃)CH₂Br

• CH₃-C(CH₃)=CHCH₂-Br

Which of the following reaction can produce aniline as main product?

• C₆H₅NO₂ + Zn/ KOH

• C₆H₅NO₂ + Zn/ NH₄Cl

• C₆H₅NO₂ + LiAlH₄

• C₆H₅NO₂ + Zn/ HCl

Which of the following is a pair of functional isomers?

• CH₃COCH₃, CH₃CHO

• C₂H₅CO₂H, CH₃CO₂CH₃

• C₂H₅CO₂H, CHCO₂C₂H₅

• CH₃CO₂H, CH₃CHO

Which of the following reacts with benzene in presence of anhydrous aluminum chloride and forms acetophenone ?

• CH₃Cl

• CH₃COOH

• CH₃CHO

• CH₃COCl

Which of the following reactions does not liberate gaseous product ?

• AlCl₃ + NaOH →

• NaOH + P(white) + H₂O →

• Al + NaOH $\stackrel{∆}{\to }$

• Zn + NaOH $\stackrel{∆}{\to }$

CH₃CH₂OH $\underset{\mathrm{Step}- 1}{\overset{{\mathrm{Cl}}_2}{\to }}$ CH₃CHO $\underset{\mathrm{Step}-2}{\overset{3{\mathrm{Cl}}_2}{\to }}$ Cl₃CCHO

In the above reaction, the role of Cl₂ in Step-1 and Step-2 respectively is:

• oxidation, chlorination

• reduction, chlorination

• oxidation, addition

• reduction,substitution

[Co(NH₃)₅SO₄]Br and [Co(NH₃)₅Br]SO₄ are a pair of ....... isomers.

• ionisation

• ligand

• coordination

• hydrate

According to Cahn-Ingold-Prelog sequence rules, the correct order of priority for the given groups is

• -COOH > -CH₂OH > -OH > -CHO

• -COOH > -CHO > -CH₂OH > -OH

• -OH > -CH₂OH > -CHO > -COOH

• -OH > -COOH > -CHO > -CH₂OH

What are X and Y respectively in the following reaction?

Z-product $\stackrel{\mathrm{Y}}{\leftarrow }$ 2-butyne $\stackrel{\mathrm{X}}{\to }$ E-product

• Na/ NH₃ (liq) and Pd/ BaSO₄ + H₂

• Ni/ 140°C and Pd/ BaSO₄ + H₂

• Ni/ 140°C and Na/ NH₃ (liq)

• Pd/ BaSO₄ + H₂ and Na/ NH₃ (liq)