ECAT Pre Engineering Chemistry Chapter 18 MCQ Test With Answer

Select from the following the one which alcohol

• 
  A
• 
  B
• 
  C
• 
  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

Cracking normally gives smaller ______

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

The general formula of saturated alicyclic hydrocarbons is:

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

The next homologue of C₁₀H₂₂will be

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

Diversity of organic compounds in millions is:

• Four A
• Five B
• Six C
• Seven D

Which one of the followings is a heterocyclic compound

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

The functional group isomer of dimethylether is

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

Which is not a nucleophile

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

In sp²type hybridization the three equivalent sp²orbitals lie in the same plane and at angle of

• 0° A
• 60° B
• 120° C
• 180° 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

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

Gasoline is a mixture of hydrocarbons containing carbon atoms

• 5 to 10 A
• 5 to 8 B
• 5 to 12 C
• 5 to 11 D

A nuclophile must

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

Which is not a fossil fuel

• Petroleum A
• Coal B
• Natural gas C
• None of them D

The self linking property of carbon is called as

• Linking polymerization A
• Addition B
• Catenation C
• Elimination D

Peat before conversion to bituminous coal is converted to

• Lignite A
• Anthracite B
• Asphalt C
• None D

The characteristic reactions of alkanes are

• Addition reactions A
• Substitution reactions B
• Condensation reactions C
• Polymerization reactions 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

Major component of natural gas is:

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

type of hybridization in CH≡CH is:

• sp A
• sp² B
• sp³ C
• dsp² D

General formula of carbocyclic acids is:

• RCOH A
• RCOR B
• RCOOR C
• R-OH D

Identify the compound formed, when ethylene combines with water in the presence of 10% sulphuric acid and HgSO₄as catalyst

• Carbinol A
• Methanol B
• Ethanol C
• Glycol D

Type of isomerism in BrCH=CHBr is:

• Structural isomerism A

• Conformational isomerism

  B
• Geometrical isomerism C
• Positional 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

The active part in a molecule is called

• Homologous series A
• Functional group B
• Chemical bonding C
• Ionic complex D

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

Due to the bacterial action on wood it is converted into

• Peat A
• Lignite B
• Bituminous coal C
• Anthracite D