Chemistry : Organic Chemistry – Some Basic Principles and Techniques

An organic compound X is oxidised by using acidified K₂Cr₂O₇. The product obtained reacts with phenyl hydrazine but does not answer silver mirror test. The possible structure of X is

• CH₃CH₂OH

• CH₃-CO-CH₃

• (CH₃)₂CHOH

• CH₃CHO

IUPAC name of (CH₃)₃CCl is

• n-butyl chloride

• 3-chloro butane

• 2-chloro 2-methyl propane

• t-butyl chloride

An organic compound on heating with CuO produces CO₂ but no water. The organic compound may be

• carbon tetrachloride

• chloroform

• methane

• ethyl iodide

Chloroacetic acid is a stronger acid than acetic acid. This can be explained using

• -M effect

• - I effect

• +M effect

• +I effect

1.2 g of organic compound of Kjeldahlization liberates ammonia which consumes 30 cm³ of 1 N HCl. The percentage of nitrogen in the organic compound is

• 30

• 35

• 46.67

• 20.8

The yellow precipitate formed during the chromyl chloride test is chemically

• chromic acid

• lead chromate

• lead acetate

• sodium chromate

Which one of the nitrogen atoms in $\underset{\mathrm{I}}{{\mathrm{H}}_2\mathrm{N}} - \underset{\mathrm{II}}{\mathrm{NH}} - \mathrm{CO} - \underset{\mathrm{III}}{{\mathrm{NH}}_2}$ is the most nucleophilic?

• III

• I

• II

• All three nitrogen atoms are equally strong nucleophilic centres

The maximum number of possible optical isomers in 1-bromo-2-methyl cyclobutane is

• 4

• 2

• 8

• 16

Which one of the following is the most energetic conformation of cyclohexane?

• Boat

• Twisted boat

• Chair

• Half-chair

Formic acud is a stronger acid than acetic acid. This can be explained using

• +M effect

• -I effect

• +I effect

• -M effect