Catalyst used in dimerisation of acetylene to prepare chloroprene is

• HgSO₄ + H₂SO₄

• Cu₂Cl₂

• Cu₂Cl₂ + NH₄Cl

• Cu₂Cl₂ + NH₄OH

The dehydration of butan-1-ol gives

• 1-butene as the main product

• 2-butene as the main product

• equal amounts of 1-butene and 2-butene

• 2-methyl propene

Cetane is a compound which has very good ignition property. Chemically it is

• CH₃(CH₂)₁₄CH₃

• (CH₃)₃C(CH₂)₁₁CH₃

• C₁₇H₃₄

• None of the above

624.

The electrophile involved in the nitration of benzene is :

• NO₂

• NO${}_2^{+}$

• NO

• NO${}_2^{-}$

Which of the following is most reactive towards electrophilic nitration ?

• Toluene

• Benzene

• Benzoic acid

• Nitrobenzene

The most suitable reagent for the following conversion, is :

• H₂, Pd/C, quinoline

• Zn/HCl

• Hg²⁺/H⁺, H₂O

• Na/liquid NH₃

The number of sigma (σ) and pi (π) pent-2-en-4-yne is

• 8σ bonds and 5π bonds

• 11σ bonds and 2π bonds

• 13σ bonds and no π bonds

• 10σ bonds and 3π bonds

Among the following, the reaction that proceeds through an electrophilic substitution, is:

An alkene "A" on reaction with O₃ and Zn–H₂O gives propanone and ethanal in equimolar ratio. Addition of HCl to alkene "A" gives "B" as the major product. The structure of product "B" is:

• H₃C—CH₂—CH(CH₂Cl)—CH₃

• 

• 

• 

Provide an acceptable name for the alkene shown below:

• 5-ethyl-6-methyl-propyl decane

• 2-ethyl-6-methyl-2-propyldecane

• 2-ethyl-6-methyl-5-propyldecane

• 6-ethyl-2-methyl-5-propyldecane