ECAT Pre Engineering Chemistry Chapter 18 MCQ Test With Answer

Ether shows the phenomenon of

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

Rates of organic reactions are

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

Types of cracking are:

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

Normal by product of cracking is

• Ethane A
• Butane B
• Benzene C
• All of them D

Functional group of ketones is:

• ---CHO A
• ---CO--- B
• ---C≡ N C
• ---COOH D

Which is the chain isomer of n-pentane

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

• Condensation A
• Dehydration B
• Dehydrogenation C
• Hydrogenation 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

Which of the following is an electrophile

• Bromine A
• KBr B
• NH₃ C
• Benzene 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

Self linkage of carbon to produce long chains

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

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

• 182 A
• 183 B
• 184 C
• 185 D

The formula of esters is

• 
  A
• 
  B
• 
  C
• 
  D

Which of the following is an aromatic compound

• Propanol A
• Cyclohexane B
• Acetone C
• Benezene D

The open chain organic compounds are called

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

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

Major component of natural gas is:

• Ethane A
• Ethene B
• Propane C
• Methane 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

Select from the following the one which alcohol

• 
  A
• 
  B
• 
  C
• 
  D

General formula of carbocyclic acids is:

• RCOH A
• RCOR B
• RCOOR C
• R-OH D

Which gasoline is better?

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

• 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

Which of the following is not a hydrocarbon

• Butane A
• Methyl benezene B
• Acetylene C
• Glucose D

Benzene is an example of

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

Ether show the phenomenon of :

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