ECAT Pre Engineering Chemistry Chapter 18 MCQ Test With Answer

Linear shape is associated with set of hybrid orbitals?

• sp A
• sp2 B
• sp3 C
• dsp2 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

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

Which of the following is complex?

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

Types of cracking are:

• Thermal A
• Catalytic B
• Steam C
• All a, b ,c 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 active part in a molecule is called

• Hetroatom A
• Functional group B
• Chemical bond C
• Ion D

The self linking of carbon atoms is called

• Chelation A
• Isomerism B
• Catenation C
• None of the above D

Ether show the phenomenon of :

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

Peat contains about

• 60% carbon A
• 80% carbon B
• 78% carbon C
• 50% carbon D

Those compound which have any atom other than C as member of rings are called as

• Monocyclic A
• Hetrocyclic B
• Aliphatic C
• Both a and b 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 is the chain isomer of n-pentane

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

• 0 A
• 1 B
• 2 C
• 3 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

Which of the following gases is used for illuminating purpose?

• Methane A
• Ethane B
• Propane C
• Butane 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

Alkanes normally have ______ hybridization

• Sp A
• Sp² B
• Sp³ C
• d sp³ D

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

Number of isomers of butane are:

• One A
• Two B
• Three C
• Four D

Homologues differ from each other by an integral number of

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

Type of isomerism in BrCH=CHBr is:

• Structural isomerism A

• Conformational isomerism

  B
• Geometrical isomerism C
• Positional isomerism D

type of hybridization in CH≡CH is:

• sp A
• sp² B
• sp³ C
• dsp² D

The general formula for alkenes is

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

Due to the bacterial action on wood it is converted into

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

General formula of carbocyclic acids is:

• RCOH A
• RCOR B
• RCOOR C
• R-OH D

Which reaction produces a free radical

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

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

• 
  A
• 
  B
• 
  C
• 
  D

Unsaturated hydrocarbon containing a double bond are called

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