ECAT Pre Engineering Chemistry Chapter 18 MCQ Test With Answer

Quality of fuel is judged from its octane number. The best fuels are

• Straight chain hydrocarbons A
• Branched chain hydrocarbons B
• Cyclic compounds C
• Compounds containing benzene ring D

The state of hybridization of carbon atom in methane is

• sp³ A
• sp² B
• sp C
• dsp² D

The open chain organic compounds are called

• Linear compounds A
• Aromatic B
• Aliphatic C
• Both A and B D

The state of hybridization of carbon atom in methane is:

• sp³ A
• sp² B
• sp C
• dsp² D

Which is a mixture of low boiling hydrocarbon

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

Which of the following has linear shape?

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

Alkanes normally have ______ hybridization

• Sp A
• Sp² B
• Sp³ C
• d sp³ D

Coal is used to bake bricks in lime kiln:

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

• 3 A
• 4 B
• 5 C
• 2 D

Organic compounds generally react at ______ rates

• Slow A
• Fast B
• Moderate C
• None of them D

General formula of carbocyclic acids is:

• RCOH A
• RCOR B
• RCOOR C
• R-OH D

Which of the following is an aromatic compound

• Propanol A
• Cyclohexane B
• Acetone C
• Benezene 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

When a carbon atom forms single bonds with other carbon atoms, these hybrid orbitals overlap with the orbitals of hydrogen to form four bonds which are

• Three sigma and one P_i A
• Two sigma and two P_i B
• One sigma and three P_i C
• sigma D

The structure of benzene is

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

Which structure shows a primary alcohol

• 
  A
• 
  B
• 
  C
• 
  D

The major portion of natural gas is

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

Major component of natural gas is:

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

In a heterollytic bond fission reaction

• A molecule of H₂O is formed A
• A molecule of H₂O is eliminated B
• A free radical is formed C
• A positive and a negative ion is formed 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

Cracking products are :

• Only alkanes A
• Only alkenes B
• Alkanes and alkenes C
• Alkynes D

The isomers due to the unequal distribution of carbon atoms on either side of the functional group belonging to the same homologous series are called

• Functional isomers A
• Position isomers B
• Chain isomers C
• Metamers D

A nuclophile must

• Be an atom A
• A group of atoms B
• Have a lone pair C
• Be negatively charged D

Which one of the followings is a heterocyclic compound

• Cyclohexanol A
• Phenol B
• Pyridine C
• Anthracene D

Self linkage of carbon to produce long chains

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

Identify the compound which has a bond angle of 109.5°

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

Which of the following is complex?

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

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

Organic compounds are soluble in all except

• Benzene A
• Petroleum B
• Ether C
• Water D