ECAT Pre Engineering Chemistry Chapter 18 MCQ Test With Answer

Which of the following is an aromatic compound

• Propanol A
• Cyclohexane B
• Acetone C
• Benezene 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

Carboxylic acid, ester, amide and amino groups are shown. Which is the correct description of these functional groups

• 
  A
• 
  B
• 
  C
• 
  D

Functional group of ketones is:

• ---CHO A
• ---CO--- B
• ---C≡ N C
• ---COOH D

The general formula for alkenes is

• C_nH_2n+1 A
• C_nH_2n+2 B
• C_nH_2n C
• C_nH_2n-2 D

Which of the following has linear shape?

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

The rotation of two carbon atoms joined by double bond would happened only if

• Pi bond is broken A
• Sigma bond is broken B
• Both bonds are broken C
• None of above D

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

• 1, 5-pentadiene A
• Penta-1, 4-diene B
• 1, 1-pentadiene C
• 1, 4-pentene 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

The process in which one s and two p orbitals mix up with each other is called

• Sp-hybridization A
• Sp²-hybridization B
• Sp³-hybridization C
• Dsp²-hybridization D

Benzene is an example of

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

Select from the following which one is alcohol?

• CH₃-CH₂-OH A
• CH₃-O-CH₃ B
• CH₃COOH C
• CH₂-CH₂-BR D

Vital force theory was rejected by

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

A double bond consists of

• Two sigma bonds A
• One sigma and one Pi bond 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

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

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

The distillation of coal at high temperature and in absence of air is called

• Vacuum distillation A
• Normal distillation B
• Fractional distillation C
• Destructive distillation D

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

• 182 A
• 183 B
• 184 C
• 185 D

Rates of organic reactions are

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

Which of the following gases is used for illuminating purpose?

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

Major component of natural gas is:

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

The fractions obtained from fractional distillation of petroleum are placed in increasing order of their boiling points. Which order is correct

• Natural gas, petroleum ether, gasoline kerosene A
• Petroleum ether, kerosene, natural gas, petroleum ether B
• Gasoline, kerosene, natural gas, petroleum ether C
• Kerosene, gasoline, petroleum ether, natural gas D

• 0 A
• 1 B
• 2 C
• 3 D

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

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

How many structural acid cis-trans isomers are there for dichloroprepe, C₃H₄Cl₂

• 3 A
• 5 B
• 6 C
• 7 D

Which set of hybrid orbitals has planar triangular shape

• sp³ A
• sp B
• sp² C
• dsp² D

Which is not a nucleophile

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

Alkynes normally have ______ hybridization

• Sp A
• Sp² B
• SP³ C
• d sp³ D