ECAT Pre Engineering Chemistry Chapter 18 MCQ Test With Answer

Ether show the phenomenon of :

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

Benzene is an example of

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

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

Linear geometry is present in:

• Sp³ A
• Sp² B
• Sp C
• D²sp³ 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 isomers due to the unequal distribution of carbon atoms on either side of the functional group belonging to the same homologous series are called

• Functional isomers A
• Position isomers B
• Chain isomers C
• Metamers D

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

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

Self linkage of carbon to produce long chains

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

Select from the following which one is alcohol?

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

Source of organic compounds primarily is:

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

Vital force theory was rejected by

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

Linear shape is associated with set of hybrid orbitals?

• sp A
• sp2 B
• sp3 C
• dsp2 D

Types of cracking are:

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

The use of tetra ethyl lead in petrol as an efficient antiknock agent is being discouraged. Which reason is correct

• It is costly A
• It damages the engine B
• Pb is difficult to obtain in bulk quantities C
• The combustion product, lead, causes air pollutions D

In the presence of high temperature and pressure peat is converted to:

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

Which reaction produces a free radical

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

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

• 3 A
• 4 B
• 5 C
• 2 D

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

The branch of chemistry which deals with the study of compounds containing carbon as an essential elements is called

• Physical A
• Inorganic B
• Nuclear C
• Organic D

Ether shows the phenomenon of

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

Peat before conversion to bituminous coal is converted to

• Lignite A
• Anthracite B
• Asphalt C
• None 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

Unsaturated hydrocarbon containing a double bond are called

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

The open chain organic compounds are called

• Linear compounds A
• Aromatic B
• Aliphatic C
• Both A and B 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

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

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

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