ECAT Pre Engineering Chemistry Chapter 18 MCQ Test With Answer

Rates of organic reactions are

• Fast A
• Very fast B
• Slow C
• Non-reactive 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

Which is a mixture of low boiling hydrocarbon

• Natural gas A
• Petroleum B
• Wood C
• Graphite D

A free radical reaction takes place in three steps, initiation, propagation and terminations. Which of the following expression represents a propagation step

• 
  A
• 
  B
• 
  C
• 
  D

n-butane and iso butane are an example of

• Chain isomerism A
• Positional isomerism B
• Meta merism C
• Functional group isomerism D

Select from the following the one which alcohol

• 
  A
• 
  B
• 
  C
• 
  D

Which reaction produces a free radical

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

• Condensation A
• Dehydration B
• Dehydrogenation C
• Hydrogenation D

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

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

Peat contains about

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

The characteristic reactions of alkanes are

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

The functional group isomer of dimethylether is

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

The self linking of carbon atoms is called

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

• 0 A
• 1 B
• 2 C
• 3 D

Products of coal is:

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

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

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

Homologues differ from each other by an integral number of

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

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

Identify the hydrocarbon formed, when ethyl bromide reacts with, alcoholic KOH at 100°

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

The percentage of methane in natural gas is

• 50% A
• 60% B
• 85% C
• 90% D

Which gasoline is better?

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

Coal is obtained from dead remains of

• Plants A
• Animals B
• Both a and b C
• None D

type of hybridization in CH≡CH is:

• sp A
• sp² B
• sp³ C
• dsp² D

Vital force theory was rejected by

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

Linear shape is associated with which set of hybrid orbitals

• sp A
• sp² B
• sp³ C
• dsp² D

Geographical survey of Pakistan estimates about billion tons of coal in Pakistan:

• 182 A
• 183 B
• 184 C
• 185 D

The catalyst,. which is used as specialist for cracking, are

• Aluminates A
• Alumlnosilicates B
• Aluminium slats C
• All can be used D