ECAT Pre Engineering Chemistry Chapter 18 MCQ Test With Answer

A double bond consists of:

• Two sigma bonds A
• One sigma and one pi bonds B
• One sigma and two pi bonds C
• Two pi bonds D

The structure of benzene is

• Hexagonal A
• Pyramidal B
• Square planer C
• Tetrahedral D

n-butane and iso butane are an example of

• Chain isomerism A
• Positional isomerism B
• Meta merism C
• Functional group isomerism D

Type of isomerism in BrCH=CHBr is:

• Structural isomerism A

• Conformational isomerism

  B
• Geometrical isomerism C
• Positional isomerism D

The compounds which have any atom other than Carbon atom, in rings are called as

• Monocyclic A
• Heterocyclic B
• Homocyclic C
• None of the above D

Replacement of hydrogen atom by - SO₃H group in benzene is called

• Nitration A
• Alkylation B
• Sulphonation C
• Acylation D

1-butene an 2-butene are an example of

• Chian isomerism A
• Positional isomerism B
• Metamerism C
• Functional group isomerism D

Geographical survey of Pakistan estimates about billion tons of coal in Pakistan:

• 182 A
• 183 B
• 184 C
• 185 D

General formula of carbocyclic acids is:

• RCOH A
• RCOR B
• RCOOR C
• R-OH D

At present oil refineries in Pakistan are:

• One A
• Two B
• Three C
• Four D

Linear shape is associated with which set of hybrid orbitals

• sp A
• sp² B
• sp³ C
• dsp² D

The characteristic reactions of alkanes are

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

The open chain compounds are also called

• Aliphatic A
• Alicylic B
• Aromatic C
• Both a and b D

Which is not a nucleophile

• Benzene A
• Chlorine B
• Ethene C
• Ethanol D

A free radical reaction takes place in three steps, initiation, propagation and terminations. Which of the following expression represents a propagation step

• 
  A
• 
  B
• 
  C
• 
  D

Which of these always applies to a nucleophile

• It attacks a double bond A
• It has a lone pair of electrons B
• It is single atom C
• It is negatively charged D

Which of the following is an aromatic compound

• Propanol A
• Cyclohexane B
• Acetone C
• Benezene D

Peat before conversion to bituminous coal is converted to

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

Major component of natural gas is:

• Ethane A
• Ethene B
• Propane C
• Methane 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

Number of isomers of butane are:

• One A
• Two B
• Three C
• Four 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

The state of hybridization of carbon atom in methane is

• sp³ A
• sp² B
• sp C
• dsp² D

Which of the following has linear shape?

• SP A
• SP² B
• SP³ C
• None of the above D

Polythene is a polymer of

• Ethane A
• Ethene B
• Acetone C
• Propylene D

• 2, 2, 4-trimethylpentane A
• 2, 4, 4-trimethylpentane B
• 2, 4, 4-methyepentane C
• 2, 2, 4-methylpentane D

Acetylene had a characteristic ethereal smell resembling that of

• Ginger A
• Vinegar B
• Garlic C
• Onion D

Vital force theory was rejected by

• Berzellius A
• Kolbe B
• Wholer C
• Lavoiser D

Normal by product of cracking is

• Ethane A
• Butane B
• Benzene C
• All of them D

Which set of hybrid orbitals has planar triangle shape?

• sp³ A
• sp B
• sp² C
• dsp² D