ECAT Pre Engineering Chemistry Chapter 18 MCQ Test With Answer

Organic compounds are soluble in all except

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

Which is the chain isomer of n-pentane

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

Cracking done at low pressure and with a catalyst is called _______ cracking

• Thermal A
• Catalytic B
• Steam C
• None of them D

Source of organic compounds primarily is:

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

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

• 3 A
• 5 B
• 6 C
• 7 D

Coal is obtained from dead remains of

• Plants A
• Animals B
• Both a and b C
• None D

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

• 
  A
• 
  B
• 
  C
• 
  D

Fossil fuels consist of :

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

Tetraethyle lead causes disease:

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

The open chain compounds are also called

• Aliphatic A
• Alicylic B
• Aromatic C
• Both a and b 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

The state of hybridization of carbon atom in methane is:

• sp³ A
• sp² B
• sp C
• dsp² D

Self linkage of carbon to produce long chains

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

Ether show the phenomenon of :

• Position isomerism A
• Functional group isomerism B
• Metamerism C
• Cis-trans isomerism 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

The functional group of acid amide is

• 
  A
• 
  B
• 
  C
• 
  D

The compounds which have any atom other than Carbon atom, in rings are called as

• Monocyclic A
• Heterocyclic B
• Homocyclic C
• None of the above 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

Products of coal is:

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

• Condensation A
• Dehydration B
• Dehydrogenation C
• Hydrogenation D

Normal by product of cracking is

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

Linear shape is associated with which set of hybrid orbitals

• sp A
• sp² B
• sp³ C
• dsp² D

Homologues differ from each other by an integral number of

• CH₂groups A
• CH₃groups B
• CH groups C
• CH₄groups 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

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

The formula of esters is

• 
  A
• 
  B
• 
  C
• 
  D

Hybridzation explain the --------- of orbitals

• Type of bonding A
• Shapes B
• Shape and type of bonding C
• None of above D