Coal

Q.

Write the characteristics and important uses of coal

Q.

What is a destructive distillation of coal?

Q.

Identify the gas that is generally produced when coal is burnt in the presence of air.

1. Carbon Monoxide

2. Sulphur Dioxide

3. Nitrogen dioxide

4. Carbon Dioxide

Q. What is coke?

Q.

Draw a labeled diagram of Destructive distillation of coal.

Q.

Is it true that coke is almost a pure form of carbon?

1. True
2. False

Q. Match the following.

	Column $A$		Column $B$
$1.$	Coke	$a.$	Used as fuel
$2.$	Coal tar	$b.$	Pure form of carbon
$3.$	Coal gas	$c.$	Thick liquid

1. $1-b;2-a;3-c$
2. $1-a;2-c;3-b$
3. $1-a;2-b;3-c$
4. $1-b;2-c;3-a$

Q.

Name two places in India where coal is found.

Q.

Tick True/False against the following statements. ​
(a) Fossil fuels can be made in the laboratory. (T/F)
(b) CNG is more polluting fuel than petrol. (T/F)
(c) Coke is the almost pure form of carbon. (T/F) ​
(d) Coal tar is a mixture of various substances. (T/F)
(e) Kerosene is not a fossil fuel. (T/F)

Q.

Coke is used in the extraction of metals such as zinc and iron from their ores. Why?

Q.

Identify the gas(es) which is released when coal is burnt in the presence of air.

1. Both Carbon dioxide and Carbon monoxide

2. Carbon dioxide

3. Carbon monoxide

4. Nitrogen

Q.

The process of conversion of wood into coal is called _______________ (colonisation/ carbonisation)

Q.

State whether the following statements are true or false :

(a) Coke is almost pure form of carbon.

(b) Coal tar is a mixture of various substances.

(c) Kerosene is not a fassil fuel.

(d) CNG is more polluting than petrol.

(e) Fossil fuels can be made in the laboratory.

Q.

The products obtained from destructive distillation of coal are:
1) Coal tar 2) Coal Gas 3) Coke 4) Ammonia
Arrange these products in the increasing order of their amounts produced.

1. 1 < 2 < 3 < 4

2. 1 < 3 < 4 < 2

3. 1 < 4 < 2 < 3

4. 4 < 1 < 3 < 2

Q. Electricity generated with the help of coal is known as

1. thermal power
2. biogas
3. hydel power
4. wind energy

Q.

The slow process by which the large land plants and trees buried deep under the earth have become coal is called :

(a) carbonation

(b) carburation

(c) carbonisation

(d) carbocation

Q.

Which is the hardest variety of coal?

Q.

Name the product(s) formed on heating coal in the absence of air.

Q. Which of the following conditions favour peat formation?

1. High acidity
2. Water flow
3. Low nutrients
4. Water logging
5. Low temperature
6. Lack of oxygen
7. Low acidity
8. Excess of oxygen
9. More nutrients
10. High temperature

Q. Can a car be powered with coal?

1. No
2. Yes

Q. Which of the following is not a fossil fuel?

1. Petroleum

2. Natural gas

3. Coal

4. Water gas

Q.

When carbon dioxide is passed over red hot charcoal, carbon monoxide is produced.

1. True
2. False

Q.

In what respect is fuel oil better than coal?

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

1. Anthracite
2. Bituminous
3. Sub-bituminous
4. Lignite

Q.

_____________ is the coal of superior quality.

1. Peat
2. Lignite
3. Bituminous
4. Anthracite

Q.

Please describe the formation of coal process.

Q. Coal is a black rock that formed from

1. Dead plants that were trapped underground millions of years ago.
2. Combining chemicals in a factory
3. Asteroids that struck the earth million years ago
4. Eruption of volcano

Q. Choose the correct statements from the following options:

1. Coal and petroleum are fossil fuels.
2. Fossil fuels are non-conventional sources of energy.
3. Petrol is obtained from petrochemicals.
4. Fossil fuels are present in limited quantity.

Q.

The process of breakdown of organic substances on heating strongly in the absence of air is called ______________.

Q. Question 2 (c)
Fill in the blank:
Fuel must be heated to its ___ before it starts burning.