When acetylene is passed through red hot iron tube, compound X is formed. Which one  of the  following reactions will yield X as the major product?

• ${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{OH} +\mathrm{Zn} \stackrel{\mathrm{Distillation}}{\to }$

• ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{SO}}_3\mathrm{H} +{\mathrm{NaHCO}}_3 \to$

• ${\mathrm{C}}_6{\mathrm{H}}_{12} + 3{\mathrm{H}}_2 \stackrel{\mathrm{Ni}}{\to }$

• ${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{Cl} + {\mathrm{H}}_2\mathrm{O} \stackrel{∆}{\to }$

2, 3-dimethyl hexane contains...... tertiary ....... secondary and ......  primary carbon atoms, respectively:

• 2,2,4

• 2,4,3

• 4,3,2

• 3,2,4

Which of the following reactions proceeds via a secondary free radical?

• ${\mathrm{CH}}_3-\mathrm{CH}={\mathrm{CH}}_2 \stackrel{\mathrm{HBr}}{\to } {\mathrm{CH}}_3-\mathrm{CHBr}-{\mathrm{CH}}_3$

• ${\mathrm{CH}}_3-\mathrm{CH}={\mathrm{CH}}_2 \underset{\mathrm{UV} \mathrm{light} }{\overset{\mathrm{HBr}}{\to }} {\mathrm{CH}}_3-{\mathrm{CH}}_2-{\mathrm{CH}}_2\mathrm{Br}$

• ${\mathrm{C}}_6{\mathrm{H}}_6 \stackrel{{\mathrm{Br}}_2/{\mathrm{FeBr}}_3}{\to } {\mathrm{C}}_6{\mathrm{H}}_5\mathrm{Br}$

• ${\mathrm{C}}_6{\mathrm{H}}_6 \underset{\mathrm{UV} \mathrm{light} }{\overset{{\mathrm{Br}}_2}{\to }} {\mathrm{CH}}_3-{\mathrm{Br}}_2$

84.

4 g of a hydrocarbon on complete combustion gave 12.571 g of CO₂ and 5.143 g of water. What is the empirical formula of the hydrocarbon ?

• CH

• CH₂

• CH₃

• C₂H₃

The chemicals and the reaction conditions required for the preparation of ethane are

• C₂H₅I, Zn-Cu, C₂H₅OH

• CH₃Cl, Na, H₂O

• KOOC-CH=CH-COOK, , electrolysis

• CH₃CO₂Na_, NaOH, CaO, Δ

What is the molecular formula of the product formed when benzene is reacted with ethyl chloride in presence of anhydrous aluminium chloride?

• C₈H₁₀

• C₆H₆

• C₈H₈

• C₆H₅Cl

The metal used for the de-brommation reaction of 1, 2-dibromoethane

• Na

• Zn

• Mg

• Li

Which of the following reagents when heated with ethyl chloride, forms ethylene ?

• Aqueous KOH

• Zn/ HCl

• Alcoholic KOH

• HI

Which of the following compounds is soluble in benzene but almost insoluble in water?

• C₂H₅OH

• CH₃CO₂H

• CH₃CHO

• C₆H₅NO₂

The compound prepared by a substitution reaction of benzene is

• acetophenone

• glyoxal

• cyclohexane

• hexabromo cyclohexane