Predict the product:

The reduction of 4-octyne with H₂ in the presence of Pd/CaSo₄ quinoline gives:

• trans-4-octene

• cis-4-octene

• a mixture of cis and trans-4-octene

• a completely reduced product C₈H₁₈

Addition of which of the following reagents to alkene is stereospecific:

I.Br₂          II. KMnO₄

III. BH₃ THF/H₂O₂.NaOH

Select the correct reagent:

• Both I and II

• Both II and III

• Both I and III

• I, II and III

Butyne-1 and butyne-2 can be distinguished by

• H₂SO₄

• AgNO₃ + NH₄OH

• K₂Cr₂O₇

• NH₄OH

525.

An unknown silver salt of monoacidic alkyne contains 67.08% silver. The structure of the alkyne is:

• ${\mathrm{CH}}_3-\mathrm{C}\equiv \mathrm{CH}$

• ${\mathrm{CH}}_3-\mathrm{C}\equiv \mathrm{CH}-{\mathrm{CH}}_3$

• ${\mathrm{CH}}_3-{\mathrm{CH}}_2-\mathrm{C}\equiv \mathrm{CH}$

• $\mathrm{CH}\equiv \mathrm{CH}$

What is obtained, when potassium succinate soluton is electrolysed ?

• Ethane

• Ethene

• Ethyne

• All of these

CH₃COOH $\stackrel{\mathrm{P}/{\mathrm{Br}}_2}{\to }$ CH₂BrCOOH

This reaction is called

• Schotton-Bauman reaction

• Finkelstin reaction

• Hell-Volhard-'Zelinsky reaction

• none of the above

Arrange the following in the decreasing order of their melting points:
I. Heptane      II. Octane
III. Nonane     IV. Decane

• IV > II > III > I

• IV > III > I > II

• I > II > IV > III

• II > III > I > IV

The most reactive hydrocarbon is :

• methane

• ethane

• ethylene

• acetylene

Which of the following is not a cumulated diene?

• Hexa - 2 , 3 - diene

• Penta - 1 , 3 - diene

• Hexa - 1 , 2 - diene

• Penta - 2 , 3 - diene