ECAT Pre Engineering Chemistry Chapter 18 MCQ Test With Answer

Which of the following is not a hydrocarbon

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

Linear shape is associated with set of hybrid orbitals?

• sp A
• sp2 B
• sp3 C
• dsp2 D

Which of the following is complex?

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

Angle 120° is observed in molecules :

• CH₄ A
• CH_3-CH₃ B
• CH -CH C
• CH_{2 =}CH₂ D

Who rejected the vital force theory

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

Coal heated in the absence of air of about 500 - 1000°C is converted to

• Coke A
• Coal gas B
• Coal tar C
• All above D

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

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

The formula of esters is

• 
  A
• 
  B
• 
  C
• 
  D

Wohler synthesized first of all the organic compound:

• Carbohydrates A
• Urea B
• Aniline C
• Toluene D

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

In ter-butyl alcohol, the tertiary carbon is bonded to

• Two hydrogen atoms A
• Three hydrogen atoms B
• One hydrogen atoms C
• No hydrogen atom D

Which is a mixture of low boiling hydrocarbon

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

In alkynes the bonds between carbon atoms are

• All sigma bonds A
• All pi(π) bonds B
• One is sigma and two areπ(pi) bonds C
• One isπ(pi) and two are sigma bonds D

Which of the following compounds contains a triple bond?

• Alkane A
• Alkene B
• Alkyne C
• Benzene D

The self linking of carbon atoms is called

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

Due to the bacterial action on wood it is converted into

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

On passing ethane into concentrated suphuric acid the intermediate compound formed on hydrolysis with boiling water gives

• Methyl alcohol A
• Ethyl alcohol B
• Ethyl hydrogen sulphate C
• Methyl hydrogen sulphate D

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

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

The major portion of natural gas is

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

The bond angle between hydrogen atoms and carbon in alkane is

• 104.5° A
• 107.5° B
• 109.5° C
• 120.5° 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

In which molecule carbon atom is sp²hybridized

• CH₄ A
• C₂H₄ B
• C₂H₂ C
• None of the above D

The active part in a molecule is called

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

Select from the following which one is alcohol?

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

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

• 182 A
• 183 B
• 184 C
• 185 D

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

• 
  A
• 
  B
• 
  C
• 
  D

Rates of organic reactions are

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

Which of the following gases is used for illuminating purpose?

• Methane A
• Ethane B
• Propane C
• Butane 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