Propyne when passed through a hot iron tube at 400°C produces :

• benzene

• methyl benzene

• dimethyl benzene

• trimethyl benzene

The name of the compound fig is:

• (2Z, 4Z)-2, 4-hexadiene

• (2Z, 4E)-2, 4-hexadiene

• (2E, 4Z)-2, 4-hexadiene

• ( 4E, 4Z)-2, 4-hexadiene

The carbide which reacts with water to form ethyne is:

• CaC₂

• SiC

• Mg₂C₃

• Al₄C₄

74.

The following reaction represent,

C₁₂H₂₆ → C₆H₁₂ + C₆H₁₄

• substitution

• synthesis

• cracking

• polymerization

Order of reactivity of C₂H₆, C₂H₄ and C₂H₂ is 

• C₂H₆ > C₂H₄ > C₂H₂

• C₂H₂ > C₂H₆ > C₂H₄ 

• C₂H₄ > C₂H₂ > C₂H₆ 

• All are equally reactive.

In Wurtz reaction alkyl halide react with

• sodium in ether

• sodium in dry ether

• sodium only

• alkyl halide in ether

What is Y in the following reaction?

C₂H₅I + NaOC₂H₅ → X + NaI

X + 2HHI $\stackrel{∆}{\to }$ 2Y + H₂O

• C₂H₆

• C₂H₅I

• C₂H₄

• C₂H₅OC₂H₅

Consider the following reaction,

C₆H₅NO₂ $\stackrel{\mathrm{Sn}/ \mathrm{HCl}}{\to }$ X $\stackrel{{\mathrm{C}}_6{\mathrm{H}}_5\mathrm{COCl}}{\to }$ Y + HCl

What is Y?

• Acetanilide

• Benzanilide

• Azo-benzene

• Hydrazo-benzene

Nitrating mixture is

• fuming nitric acid

• mixture of conc H₂SO₄ and conc HNO₃

• mixture of nitric acid and anhydrous zinc chloride

• None of the above

Consider the following reactions:

$$\begin{gathered} \mathrm{X} + \mathrm{HCl} \underset{\left(\mathrm{Addition}\right)}{\overset{\mathrm{Anhydrous} {\mathrm{AlCl}}_3}{\to }} {\mathrm{C}}_2{\mathrm{H}}_5\mathrm{Cl} \\ \underset{\left(\mathrm{Substitution}\right)}{\overset{\mathrm{Ahydrous} {\mathrm{ZnCl}}_2/ \mathrm{HCl}}{\leftarrow }} \mathrm{Y} \end{gathered}$$

Y can be conserted to X on heating with ....... at ...... temperature :

• Al₂O₃, 350°C

• Cu, 300°C

• Ca(OH)₂+ CaOCl₂, 60°C

• NaOH/I_2, 60°C