ECAT Pre Engineering Chemistry Chapter 18 MCQ Test With Answer

Fossil fuels consist of :

• Coal A
• Natural gas B
• Petroleum C
• All of these D

Hydrocarbons contain

• C and S only A
• C and H only B
• C, H, and O only C
• C, H, O and N only D

Peat before conversion to bituminous coal is converted to

• Lignite A
• Anthracite B
• Asphalt C
• None D

Gasoline is a mixture of hydrocarbons containing carbon atoms

• 5 to 10 A
• 5 to 8 B
• 5 to 12 C
• 5 to 11 D

Rates of organic reactions are

• Fast A
• Very fast B
• Slow C
• Non-reactive D

Which of the following is complex?

• CaSO₄. 0.5H₂O A
• (C₆H₁₀O₅)_n B
• C₆H₁₂O₆ C
• CH₄ D

Which of the following is an electrophile

• Bromine A
• KBr B
• NH₃ C
• Benzene D

Angle 120° is observed in molecules :

• CH₄ A
• CH_3-CH₃ B
• CH -CH C
• CH_{2 =}CH₂ D

The process in which orbitals of different energies and shapes mix up with each other to give equivalent is called,

• Hybridization A
• Polymerization B
• Isomerisation C
• Carbonization D

• 1 A
• 2 B
• 3 C
• 4 D

Similarity in properties of different organic compounds give rise to the under standing of ______

• Polymerization A
• Non-polar nature B
• Homologous series C
• Isomerism D

Which of the following is not a hydrocarbon

• Butane A
• Methyl benezene B
• Acetylene C
• Glucose D

The characteristic reactions of alkanes are

• Addition reactions A
• Substitution reactions B
• Condensation reactions C
• Polymerization reactions D

Compounds having same molecular formula but different structures are said to be

• Monomers A
• Isomers B
• Metamers C
• Tautomers D

Major component of natural gas is:

• Ethane A
• Ethene B
• Propane C
• Methane D

Coal is used to bake bricks in lime kiln:

• 40% A
• 60% B
• 80% C
• None of these D

Coal is obtained from dead remains of

• Plants A
• Animals B
• Both a and b C
• None D

The major components of coal gas are

• Hydrogen and methane A
• Ethane and carbon monoxide B
• Nitrogen and ethane C
• Ethane and carbon dioxide D

In sp²type hybridization the three equivalent sp²orbitals lie in the same plane and at angle of

• 0° A
• 60° B
• 120° C
• 180° D

Closed chain compound can be classified into

• Homocyclic A
• Hetrocyclic B
• Aliphatic C
• Both a and b D

The process in which one s and two p orbitals mix up with each other is called

• Sp-hybridization A
• Sp²-hybridization B
• Sp³-hybridization C
• Dsp²-hybridization D

Which of the following gases is used for illuminating purpose?

• Methane A
• Ethane B
• Propane C
• Butane D

The fractions obtained from fractional distillation of petroleum are placed in increasing order of their boiling points. Which order is correct

• Natural gas, petroleum ether, gasoline kerosene A
• Petroleum ether, kerosene, natural gas, petroleum ether B
• Gasoline, kerosene, natural gas, petroleum ether C
• Kerosene, gasoline, petroleum ether, natural gas D

• Addition Elimination A
• Addition Reduction B
• Elimination Reduction C
• Substitution Elimination D

Catenation is a process in which carbon shows the properties of making

• Multiple bonds A
• Hybridization B
• Long chains or rings of carbon atom C
• Showing isomerism D

Which structure shows a primary alcohol

• 
  A
• 
  B
• 
  C
• 
  D

Type of isomerism in BrCH=CHBr is:

• Structural isomerism A

• Conformational isomerism

  B
• Geometrical isomerism C
• Positional isomerism D

The percentage of methane in natural gas is

• 50% A
• 60% B
• 85% C
• 90% D

Linear shape is associated with which set of hybrid orbitals

• sp A
• sp² B
• sp³ C
• dsp² D

• 3 A
• 4 B
• 5 C
• 2 D