ECAT Pre Engineering Chemistry Chapter 18 MCQ Test With Answer

Rates of organic reactions are

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

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

• 182 A
• 183 B
• 184 C
• 185 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 which molecule carbon atom is sp²hybridized

• CH₄ A
• C₂H₄ B
• C₂H₂ C
• None of the above D

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

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

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

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

Number of isomers of butane are:

• One A
• Two B
• Three C
• Four 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

Self linkage of carbon to produce long chains

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

The next homologue of C₁₀H₂₂will be

• C₉H₂₀ A
• C₁₂H₂₆ B
• C₁₁H₂₄ C
• C₁₃H₂₈ D

Products of coal is:

• Peat A
• Lignite B
• Bituminous coal C
• All above D

1-butene an 2-butene are an example of

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

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

Fossil fuels consist of :

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

Acetylene had a characteristic ethereal smell resembling that of

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

Type of isomerism in BrCH=CHBr is:

• Structural isomerism A

• Conformational isomerism

  B
• Geometrical isomerism C
• Positional isomerism D

• 0 A
• 1 B
• 2 C
• 3 D

The structure of benzene is

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

Which of the following pair contains isomers of each other

• Propanoic acid and propanone A
• Acetone and acetaldehyde B
• Ethyl alcohol and diethyl ether C
• Methyl alcohol and dimethyl ether D

Which is not a nucleophile

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

Which of the following has linear shape?

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

• 3 A
• 4 B
• 5 C
• 2 D

Which is the chain isomer of n-pentane

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

Tetraethyle lead causes disease:

• Typhoid A
• Respiratory B
• Stomach C
• Muscular D

Which of the following is an electrophile

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

Cracking products are :

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

• 1 A
• 2 B
• 3 C
• 4 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

Alkanes normally have ______ hybridization

• Sp A
• Sp² B
• Sp³ C
• d sp³ D