ECAT Pre Engineering Chemistry Chapter 18 MCQ Test With Answer

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

Which reaction produces a free radical

• SN reaction A
• Homelytic fission reaction B
• Heterolytic fission reaction C
• Addition reaction D

Cracking products are :

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

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

• Metamerism A
• Position isomerism B
• Chain isomerism C
• Functional group isomerism D

Which of the following is complex?

• CaSO₄. 0.5H₂O A
• (C₆H₁₀O₅)_n B
• C₆H₁₂O₆ C
• CH₄ D

Which gasoline is better?

• Of low boiling point A
• Of low molecular mass B
• Of high octane C
• All of these D

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

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

Wohler succeeded in obtaining, urea from

• Cyanogen A
• Ammonium cyanate B
• Ammonium hydroxide C
• None of these D

General formula of carbocyclic acids is:

• RCOH A
• RCOR B
• RCOOR C
• R-OH D

Compounds of carbon and hydrogen in which the tetra valency of carbon is fully satisfied are called,

• Saturated A
• Un-saturated B
• Magnetic C
• Para-magnetic D

Coal is used to bake bricks in lime kiln:

• 40% A
• 60% B
• 80% C
• None of these D

• 1 A
• 2 B
• 3 C
• 4 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

Organic compounds are soluble in all except

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

The process in which orbitals of different energies and shapes mix up with each other to give equivalent is called,

• Hybridization A
• Polymerization B
• Isomerisation C
• Carbonization D

Which of the following gases is used for illuminating purpose?

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

The formula of ketone is

• 
  A
• 
  B
• 
  C
• None of these D

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

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

The open chain compounds are also called

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

Who rejected the vital force theory

• Wholer A
• Fisher B
• Newton C
• Lewis D

Replacement of hydrogen atom by - SO₃H group in benzene is called

• Nitration A
• Alkylation B
• Sulphonation C
• Acylation D

Linear shape is associated with set of hybrid orbitals?

• sp A
• sp2 B
• sp3 C
• dsp2 D

The major portion of natural gas is

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

A nuclophile must

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

• 3 A
• 4 B
• 5 C
• 2 D

The atom other than C in a hetrocyclic compound is called as

• Hetroatom A
• Hetroion B
• Hetromolecule C
• Hetroelement 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

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

Quality of fuel is judged from its octane number. The best fuels are

• Straight chain hydrocarbons A
• Branched chain hydrocarbons B
• Cyclic compounds C
• Compounds containing benzene ring D