Identify the correct statements for a ring system to exhibit aromaticity

(i) It must not be planar

(ii) The ring must contain (4n+ 2)Π electrons.

(iii) The ring must be planar.

(iv) It must possess 4n Π electrons.

The correct answer is:

• ii, iv

• i, ii

• i, iv

• ii, iii

382.

How many isomeric butanes are there?

• 2

• 3

• 4

• 5

Aromatic properties of benzene are proved by

• aromatic sextet theory

• resonance theory

• molecular orbital theory

• All of the above

Marsh gas primarily contains

• C₂H₂

• CH₄

• H₂S

• CO

Benzene hexachloride is used as

• dye

• antimalarial drug

• antibiotic

• insecticide

The correct order of stability of following carbocation is

• (III) > (II) > (I) > (IV)

• (II) > (III) > (I) > (IV)

• (I) > (II) > (III) > (IV)

• None of the above

Baeyer's reagent decolourises which of the following?

• Alkane

• Alkene

• Alkene and alkyne both

• None of the above

CO₂ gas obtained by the combustion of 12 mL butane gas is

• 3 mL

• 12 mL

• 24 mL

• 48 mL

LPG is a mixture of

• C₆H₁₂ + C₆H₆

• C₄H₁₀ + C₃H₈

• C₂H₄ + C₂H₂

• C₂H₄ + CH₄

Alkene which on ozonolysis yields acetone, is

• CH₂=CH-CH₂-CH₃

• CH₃-CH=CH₂

• CH₃-CH=CH-CH₃

• (CH₃)₂-C=C-(CH₃)₂