ECAT Pre Engineering Chemistry Chapter 18 MCQ Test With Answer

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

Sp³ hybridization occurs when carbon is bound to

• Four other atoms A
• Three other atoms B
• Two other atoms C
• One other atoms 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

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

Wohler synthesized first of all the organic compound:

• Carbohydrates A
• Urea B
• Aniline C
• Toluene D

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

• 3 A
• 5 B
• 6 C
• 7 D

Ether shows the phenomenon of

• position isomerism A
• Chain isomerism B
• Metamerism C
• Cir-trans isomerism D

Cracking normally gives smaller ______

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

Products of coal is:

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

Coal is used to bake bricks in lime kiln:

• 40% A
• 60% B
• 80% C
• None of these 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 of the following contains single bonds

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

Which is not the poplar reaction

• 
  A
• 
  B
• 
  C
• 
  D

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

• Metamerism A
• Position isomerism B
• Chain isomerism 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

Organic compounds are soluble in all except

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

Tetraethyle lead causes disease:

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

Which is not a nucleophile

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

Types of cracking are:

• Thermal A
• Catalytic B
• Steam C
• All a, b ,c 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

Unsaturated hydrocarbon containing a double bond are called

• paraffin A
• Alkanes B
• Olefins C
• Acetylene D

The open chain compounds are also called

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

Alkanes normally have ______ hybridization

• Sp A
• Sp² B
• Sp³ C
• d sp³ 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

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

Identify the heterocyclic compound

• Toluene A
• Pyridine B
• Butanoic acid C
• Propenol D

Major component of natural gas is:

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

The quality of petroleum is determined by

• Decane number A
• Octane number B
• Nexane number C
• None of these 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 gasoline having octane No. 100 has ______

• More knocking A
• Less knocking B
• No knocking C
• Only knocking D