Organic Chemistry

Question 1

Chemist who synthesized urea

Answer 1

Friedrick wohler in 1828

Question 2

Vital force theory was proposed by

Answer 2

Berzelius in 1809

Question 3

Features of organic compounds

Answer 3

Catenation
Non-ionic character (covalent bond)
Similarity in behavior
Complexity of structures
Isomerism
Rate of organic reactions
Solubility

Question 4

C2H5OH

Answer 4

Ethyl alcohol

Question 5

CH3-O-CH3

Answer 5

Dimethyl ether

Question 6

Sources of organic compounds

Answer 6

Coal
Natural gas
Petroleum

Question 7

Percentage of coal to bake bricks in line kilns

Answer 7

80%

Question 8

Major portion of natural gas is

Answer 8

Methane

Question 9

% of ethane in natural gas

Answer 9

8-10%

Question 10

Natural gas consists of

Answer 10

Methane, ethane, propane, butane and small amount of CO2, N2, H2S and He.

Question 11

Total number of oil refineries in Pakistan

Answer 11

4

Question 12

Name of oil refineries in Pakistan

Answer 12

Attock oil refinery
National refinery Ltd.
Pakistan refinery Ltd.
Pak-Arab Refinery

Question 13

Total coal resources of Pakistan are estimated to be

Answer 13

184 billion tonnes

Question 14

Types of cracking

Answer 14

Thermal cracking
Catalyst cracking
Steam cracking

Question 15

Thermal cracking is used to produce

Answer 15

Unsaturated hydrocarbons such as ethene and propene

Question 16

Catalytic cracking produces

Answer 16

Gasoline

Question 17

Steam cracking is used to produce

Answer 17

Lower unsaturated hydrocarbons

Question 18

Properties of a fuel having octane number

Answer 18

Less knocking
Burns smoothly in combustion engine
Increase the efficiency of engine

Question 19

Knocking order

Answer 19

Straight chain paraffins>branched chain paraffins>olefins>naphthalene>arenes

Question 20

N-octane after reforming produces

Answer 20

2,2,4-Trimethyl pentane (iso-octane)

Question 21

Octane number of 2,2,4-Trimethyl pentane (iso-octane) is

Answer 21

100

Question 22

Knocking number of n-heptane is

Answer 22

0

Question 23

Reforming increases

Answer 23

The quality of fuel

Question 24

Cracking increases

Answer 24

The quantity of gasoline

Question 25

Which agent acts as a negative catalyst as an anti knocking agent

Answer 25

Tetraethyl lead (C2H5)4Pb

Question 26

The crude petroleum is separated in fractions by:

Answer 26

Fractional distillation

Question 27

The compound that burns smoothly in an engine having octane number of 100 is

Answer 27

2,2,4-Trimethyl pentane

Question 28

Friendrick wohler synthesized urea by heating

Answer 28

NH4CNO