In the compound $\mathrm{HC}\equiv \mathrm{C}-\mathrm{C}\left({\mathrm{CH}}_3\right)={\mathrm{CH}}_2$ the hybridisation of C-2 and C-3 carbons are respectively

• sp³ and sp³

• sp² and sp³

• sp² and sp

• sp³ and sp

112.

Which one of the following formulae does not represent an organic compound ?

• C₄H₁₀O₄

• C₄H₆O₄

• C₄H₇ClO₄

• C₄H₉O₄

C₆H₅NO₂ $\stackrel{\mathrm{Sn}/ \mathrm{HCl}}{\to }$ C₆H₅X

'X' is identified as:

• NO

• -NH₂

• NHOH

• None of these

The test for unsaturation is confirmed by the decolourisation of which of the following ?

• Iodine water

• CusO₄ solution

• Bromine water

• All of these

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

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