ECAT Pre Engineering Chemistry Chapter 18 MCQ Test With Answer

Self linkage of carbon to produce long chains

• isomerism A
• Polymorphism B
• Polymerization C
• Catenation D

Which structure shows a primary alcohol

• 
  A
• 
  B
• 
  C
• 
  D

Acetylene had a characteristic ethereal smell resembling that of

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

Polythene is a polymer of

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

Which statement is true about a free radical

• An atom with a positive charge A
• An atom with a negative charge B
• An atom with a lone pair of electrons C
• An atom with unpaired electron D

The active part in a molecule is called

• Hetroatom A
• Functional group B
• Chemical bond C
• Ion D

Identify the heterocyclic compound

• Toluene A
• Pyridine B
• Butanoic acid C
• Propenol D

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

In t-butyl alcohol, the tertiary carbon is bonded to:

• Two hydrogen atom A
• Three hydrogen atoms B
• One hydrogen atoms C
• No hydrogen atoms D

Organic compounds resemble to those of inorganic compounds having same

• Ionic properties A
• Carbon forming long chain or rings B
• Chemical forces C
• Isomerism D

Sp³ hybridization occurs when carbon is bound to

• Four other atoms A
• Three other atoms B
• Two other atoms C
• One other atoms D

Identify the compound which has a bond angle of 109.5°

• Ethyne A
• Ethere B
• Methane C
• Benzene D

Linear shape is associated with set of hybrid orbitals?

• sp A
• sp2 B
• sp3 C
• dsp2 D

Which of the following is complex?

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

Number of isomers of butane are:

• One A
• Two B
• Three C
• Four D

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

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

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

On passing ethane into concentrated suphuric acid the intermediate compound formed on hydrolysis with boiling water gives

• Methyl alcohol A
• Ethyl alcohol B
• Ethyl hydrogen sulphate C
• Methyl hydrogen sulphate D

Which is a mixture of low boiling hydrocarbon

• Natural gas A
• Petroleum B
• Wood C
• Graphite D

Peat contains about

• 60% carbon A
• 80% carbon B
• 78% carbon C
• 50% carbon D

Closed chain compound can be classified into

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

The catalyst,. which is used as specialist for cracking, are

• Aluminates A
• Alumlnosilicates B
• Aluminium slats C
• All can be used D

Due to the bacterial action on wood it is converted into

• Peat A
• Lignite B
• Bituminous coal C
• Anthracite D

In the presence of high temperature and pressure peat is converted to:

• Lignite A
• Polymorphism B
• Polymerization C
• Catenation D

Peat before conversion to bituminous coal is converted to

• Lignite A
• Anthracite B
• Asphalt C
• None 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

The active part in a molecule is called

• Homologous series A
• Functional group B
• Chemical bonding C
• Ionic complex D

Alkynes normally have ______ hybridization

• Sp A
• Sp² B
• SP³ C
• d sp³ D