ECAT Pre Engineering Chemistry Chapter 18 MCQ Test With Answer

Identify the compound which has a bond angle of 109.5°

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

Wholer prepared urea from

• Ammonia A
• NH₄CNO B
• NH₃ C
• Uric acid D

Cracking normally gives smaller ______

• Alkanes A
• Alkenes B
• Alkynes C
• Both a and b D

Identify the hydrocarbon formed, when ethyl bromide reacts with, alcoholic KOH at 100°

• Methane A
• Ethane B
• Ethene C
• Ethyne 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

Which is the chain isomer of n-pentane

• Isopentane A
• Neopentene B
• N-pentene C
• Isopentene D

Which set of hybrid orbitals has planar triangular shape

• sp³ A
• sp B
• sp² C
• dsp² D

Linear geometry is present in:

• Sp³ A
• Sp² B
• Sp C
• D²sp³ D

At present oil refineries in Pakistan are:

• One A
• Two B
• Three C
• Four D

Organic compounds are soluble in all except

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

Source of organic compounds primarily is:

• Plants A
• Animals B
• Minerals C
• A & B D

Self linkage of carbon to produce long chains

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

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

The structure of benzene is

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

In ter-butyl alcohol, the tertiary carbon is bonded to

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

Who rejected the vital force theory

• Wholer A
• Fisher B
• Newton C
• Lewis D

Alkanes normally have ______ hybridization

• Sp A
• Sp² B
• Sp³ C
• d sp³ D

The bond angle between hydrogen atoms and carbon in alkane is

• 104.5° A
• 107.5° B
• 109.5° C
• 120.5° D

The functional group isomer of dimethylether is

• Ethyl alcohol A
• Propyl alcohol B
• Diethyl ether C
• Butyl alcohol D

Which set of hybrid orbitals has planar triangle shape?

• sp³ A
• sp B
• sp² C
• dsp² D

Cracking products are :

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

Which of the following posses linear geometry

• Alkane A
• Alkene B
• Alkyne C
• Benzene D

Compounds having the same molecular formula, but different functional groups show

• Metamerism A
• Position isomerism B
• Chain isomerism C
• Functional group isomerism 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

Normal by product of cracking is

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

Benzene is an example of

• Aromatic compound A
• Cyclic compound B
• Aliphatic compound C
• A cyclic compound D

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

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

Which of the following is a product of destructive distillation of coal

• Ammonia A
• Coke B
• Cyanides C
• Kerosene D

Those compound which have any atom other than C as member of rings are called as

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

Which of the following compounds contains a triple bond?

• Alkane A
• Alkene B
• Alkyne C
• Benzene D