Toluene is nitrated and the resulting product is reduced with tin and hydrochloric acid. The product so obtained is diazotised and then heated with cuprous bromide. The reaction mixture so formed contains

• mixture of o− and p−bromotoluenes

• mixture of o− and p−dibromobenzenes

• mixture of o− and p−bromoanilines

• mixture of o− and p−bromoanilines

The organic chloro compound, which shows complete stereochemical inversion during a S_N2 reaction,is

• (C₂H₅)₂CHCl 

•  (CH₃)₃CCl

• (CH₃)₂CHCl

• (CH₃)₂CHCl

The treatment of CH₃MgX with CH₃C≡C−H produces

• CH₃−CH=CH₂ 

• CH₃C≡C−CH₃

• 
• 

Which of the following reactions will yield 2, 2-dibromopropane?

• CH₃ – C ≡ CH + 2HBr →

• CH₃CH = CHBr + HBr →

• CH ≡ CH + 2HBr →

• CH ≡ CH + 2HBr →

Presence of a nitro group in a benzene ring -

• activates the ring towards electrophilic substitution

• renders the ring basic

• deactivates the ring towards nucleophilic substitution

• deactivates the ring towards nucleophilic substitution

486.

Which of the following is the correct order of decreasing S_N2 reactivity? 

• RCH₂X > R₃CX > R₂CHX

• RCH₂X > R₂CHX > R₃CX

• R₃CX > R₂CHX >RCH₂X

• R₃CX > R₂CHX >RCH₂X

The IUPAC name of 

• 1, 1-diethyl-2-dimethylpentane

• 4, 4-dimethyl-5, 5-diethylpentane

• 5, 5-diethyl-4, 4-dimethylpentane

• 5, 5-diethyl-4, 4-dimethylpentane

HBr reacts with CH₂ = CH – OCH₃ under anhydrous conditions at room temperature to give 

• CH₃CHO and CH₃Br

• BrCH₂CHO and CH₃OH

• BrCH₂ – CH₂ – OCH₃

• H₃C – CHBr – OCH₃

The IUPAC name of the compound shown below is

• 2-bromo-6-chlorocyclohex-1-ene

• 6-bromo-2-chlorocyclohexene

• 3-bromo-1-chlorocyclohexene

• 3-bromo-1-chlorocyclohexene

Phenyl magnesium bromide reacts with methanol to give

• a mixture of anisole and Mg(OH)Br

• a mixture of benzene and Mg(OMe)Br

• a mixture of toluene and Mg(OH)Br

• a mixture of toluene and Mg(OH)Br