211.

The number of possible alkyns with molecular formula C₅H₈ is

• 3

• 4

• 5

• 6

Ammoniacal silver nitrate form a white precipitate easily with

• CH₃C≡CH

• CH₃C≡C-CH₃

• CH₃CH=CH₂

• CH₂=CH₂

Which of the following compounds would have the highest boiling point ?

• CH₃CH₂CH₂CH₃

• CH₃NH₂

• CH₃OH

• CH₂F₂

The quality of diesel is expressed by

• octane number

• cetane number

• antiknock compound

• presence of additives

An alkene having molecular formula, C₆H₁₀ gives  OHC(CH₂)₄CHO, on ozonolysis. The alkene is

• hexene-1

• hexene-2

• cyclohexene

• 1-methylcyclohexene-1

When petroleum is heated gradually, the first batch of vapours evolved will be rich in

• kerosene oil

• diesel oil

• lubricating oil

• petroleum ether

The correct name for the following hydrocarbon is

• tricycle [4.1.0] heptane

• bicyclo [5.2.1] heptane

• bicyclo [4.1.0] heptane

• bicyclo [4.1.0] hexane

The number of isomeric alkanes having the molecular formula C₅H₁₂ is

• Three

• Five

• nine

• Thirty two

Which organic compound is an electrolyte ?

• CH₃Cl

• HCOOH

• CH₃OH

• C₆H₁₂O₆

The petrol, octane number of which is 80, has

• 20% n-heptane + 80% iso-octane

• 20% n-heptane + 80% n-octane

• 80% n-heptane + 20% iso-octane

• 80% n-heptane+ 20% n-octane