Free Coal and Petroleum 02 Practice Test - 8th Grade 

Question 1

Among the following four types/grades of coal, which has the highest carbon content?

A. Anthracite
B. Lignite
C. Bituminous
D. Peat

SOLUTION

Solution : A

Different types of coal have different carbon content.

  • Anthracite has the highest carbon content, between 92% to 98% and is often referred to as hard coal for this reason.
  • Bituminous coal has a carbon content between 77% to 87%.
  • Lignite has a carbon content between 60% to 70%. 
  • Peat has the lowest carbon content, less than 60%.

Question 2

What is the least polluting fuel for the vehicles?

A.

Petrol

B.

Natural Gas

C.

Vapour Gas

D.

Kerosene

SOLUTION

Solution : B

Natural gas is stored under high pressure as Compressed Natural Gas (CNG). It is a cleaner fuel as it emits less toxic gases into the atmosphere than other fuels like petrol, diesel and coal upon combustion. Hence, it is now being used as a fuel for transport vehicles.

Question 3

Which amongst the following options are true regarding coal tar?

A. Black thick liquid
B. Unpleasent smell
C. Mixture of about 200 substances
D. Known as liquid gold

SOLUTION

Solution : A, B, and C

Coal tar is a by-product obtained due to distructive distillation of coal. It is a black, thick liquid with unpleasant smell.  It is a mixture of about 200 substances.
However, petroleum is known as liquid gold

Question 4

Which of the following can be used as a solvent in dry cleaning?

A. Water
B. Coal gas
C. Coal Tar
D. Petroleum

SOLUTION

Solution : D

Petroleum is used as a solvent in dry cleaning industry due to its high degreasing ability, i.e., it can easily remove stains from clothes. It is one among the three commonly used solvents used in this industry and has been used since ancient times.

Question 5

_________ is a thick black liquid formed during destructive distillation of coal.

A. Coke
B. Coal tar
C. Coal gas
D. Petroleum

SOLUTION

Solution : B

Coal tar is a thick black liquid formed during the industrial processing of coal. It has an unpleasant odour and has high viscosity. It is used to manufacture various substances like synthetic dyes, paints, drugs and etc.

Question 6

Crude oil or petroleum has hydrocarbons that have different boiling points.

A. True
B. False

SOLUTION

Solution : A

Crude oil or petroleum has components like petrol, diesel, kerosene, etc. These products have different boiling points which are useful in separating them through fractional distillation.

Question 7

Identify the product that is produced by baking coal in a heated oven.

A. Coke
B. Coal tar
C. Coal gas
D. Solid coal

SOLUTION

Solution : A

Coke is produced by baking coal in a heated oven. It is a fuel with high carbon content, generally used in the extraction of metals, manufacture of graphite, as a household fuel etc. Its price in the market depends upon the amount of ash and sulphur content present in it.

Question 8

Match the following:

Petroleum ProductsUses1. Petrola.Paints and Road surfacing2. Paraffin waxb.Fuel for stove3. Kerosenec.Candels and vaseline4. LPGd.Fuel for vehicles5. Bitumene.Cooking cylinder

A.

1-d, 2-c, 3-b, 4-e and 5-a

B.

1-c, 2-d, 3-b, 4-e and 5-a​

C.

1-e, 2-c, 3-b, 4-a and 5-d

D.

1-d, 2-c, 3-e, 4-b and 5-a

SOLUTION

Solution : A

The table below shows the list of petroleum byproducts and their respective uses.
Petroleum ProductsUsesPetrolFuel for vehiclesParaffin waxCandels and vaselineKeroseneFuel for stovePetroleum GasAs LPGBitumenPaints and Road surfacing

Question 9

The slow process of conversion of dead vegetation into coal is called _____.

A. decomposition
B. evolution
C. carbonification
D. carbonisation

SOLUTION

Solution : D

Plants contain mainly carbon, which gets converted into coal. Hence, the slow process of conversion of dead vegetation into coal is called carbonisation. 

Question 10

Identify the substance which is tough, porous and black. It is almost a pure form of carbon.

A. Crude oil
B. Coke
C. Coal tar
D. Coal gas

SOLUTION

Solution : B

Coke is a tough, porous and black substance. It is almost a pure form of carbon. It is used in the manufacture of steel and also in the extraction of many metals.