Chemistry : Organic Chemistry – Some Basic Principles and Techniques

Methoxy methane and ethanol are :

• positionl isomers

• chain isomers

• functional isomers

• optical isomers

Lassaigne's test for the detection of nitrogen fails in

• H₂N-CO-NHNH₂.HCl

• NH₂-NH₂.HCl

• C₆H₅-NH-NH₂.HCl

• C₆H₅CONH₂

The purity of an organic compound is determined by

• Chromatography

• Crystallisation

• melting or boiling point

• both( A )and (C)

Which of the following is aromatic?

KI and CusO₄ solution when mixed gives :

• CuI₂ + K₂SO₄

• Cu₂I₂ + K₂SO₄ + I₂

• K₂SO₄ + Cu₂I₂ + I₂

• K₂SO₄ + CuI₂ + I₂

In the reaction ,  $\stackrel{{\mathrm{NaNH}}_2/\mathrm{liq}. \mathrm{ammonia}}{\to }$ A , the major product A is :

Assertion : CN^- ion is an ambident nucleophile.

Reason: Nucleophiles are electron rich species.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false

• If both assertion and reason are false

Calcium burns in nitrogen to produce a white powder which dissolves in sufficient water to produce a gas A and an alkaline solution .The solution on exposure to air produces a thin solid layer of B on the surface .The compounds A and B will be :

• Ca₃N₂ , NH₃

• NH₃ , CO₂

• Ca(OH)₂ , CaCO₃

• NH₃ , CaCO₃

Arrange the following compounds in increasing order of reactivity towards nucleophilic addition reaction.

(I) C₆H₅COCH₃

(II) CH₃CO-C₂H₅

(III) C₆H₅CHO

(IV) Cl-CH₂-CHO

• IV > III > II > I

• IV > II > III > I

• I > II > III > IV

• III > IV > II > I

Which of the following compounds are optically active?

• 1 and 2

• 2 and 3

• 3 and 4

• 1 and 4