In 2-butene, which one of the following statements is true?

• C₁-C₂ bond is a sp³- sp³- $\mathrm{\sigma }$-bond

• C₂- C₃ bond is sp³ - sp²- $\mathrm{\sigma }$-bond

• C₁- C₂ bond is a sp³ - sp² - $\mathrm{\sigma }$-bond

• C₁- C₂ bond is a  sp²- sp²- $\mathrm{\sigma }$-bond 

The ease of nitration of the following three hydrocarbons follows the order 

• II - III ≈ I

• II > III > I

• III > II > I

• I = III > II

Among the alkenes which one produces tertiary butyl alcohol on acid hydration? 

• CH₃-CH₂-CH=CH₂

• CH₃-CH=CH-CH₃

• (CH₃)₂C=CH₂

• CH₃-CH=CH₂

Friedel-Craft's reaction using MeCl and anhydrous AlCl₃ will take place most efficiently with

• benzene

• nitrobenzene

• acetophenone

• toluene

Under identical conditions, the S_N1 reaction will occur most efficiently with

• tert-butyl chloride

• 1-chlorobutane

• 2-methyl-1-chloropropane

• 2-chlorobutane

26.

An equimolar mixture of toluene and chlorobenzene is treated with a mixture of conc.H₂SO₄ and cone. HNO₃. Indicate the correct statement from the following.

• p-nitrotoluene is formed in excess

• equimolar amounts of p-nitrotoluene and p-nitrochlorobenzene are formed

• p-nitrochlorobenzene is formed in excess

• m-nitrochlorobenzene is formed in excess

Among the following carbocations:
Ph₂C⁺CH₂Me (I), PhCH₂CH₂CH⁺Ph (II),Ph₂CHCH⁺Me (III) and Ph₂C(Me)CH₂ (IV), the order of stability is

• IV > II > I > III

• I > II > III > IV

• II > I > IV > III

• I > IV > III > II

The major product obtained in the reaction

The reaction of toluene with chlorine in presence of ferric chloride gives predominatly

• benzoyl chloride

• m - chlorotoluene

• benzyl chloride

• o- and p - chlorotoluene

In benzene, the triple bond consists of

• one sp-sp sigma bond and two p-p pi bonds

• two sp-sp sigma bonds and one p-p pi bond

• one sp²-sp² sigma bond, one p-p pi bond

• one sp²-sp² sigma bond, one sp²-sp² pi bond and one p-p pi bond