Ideal Fuel

Q.

The amount of heat energy produced on complete combustion of 1 Kg of a fuel is called its __________

Q. LPG is an example of a liquid fuel.

1. True
2. False

Q. In villages, people use wood as fuel for cooking and other needs because:

1. it is considered to be an ideal fuel
2. of its low cost and easy availability
3. it is eco-friendly
4. it catches fire easily

Q. Question 18
(a) The slow process of conversion of dead vegetation into coal is called___.
(b) Coal and petroleum are formed from the dead remains of organisms and are known as ___.
(c) The black thick liquid with ___ smell is known as coal tar
(d) During the processing of coal to get coke, coal tar and ___ are also obtained.
(e) The process of separating the various constituents of petroleum is known as ___.
(f) Excessive burning of fossil fuels is a major cause of ___.

Q. A flame is formed during burning of a substance due to ___ .

1. Fire provided a portable form of light and could protect from predators

2. All the above options are correct.

3. Fire could provide heat

4. Fire could be used to cook food

Q.

Which of the following options can be correctly associated with fuels?

1. The substance that undergoes combustion and produces energy.

2. The substance that is liquid in nature.

3. The substance which cannot be broken down into smaller pieces.

4. The substance which is infammable.

Q.

Is coal made of hydrocarbons?

1. True
2. False

Q. _____ is a liquid fuel which is used in gas stoves for cooking in household.

1. Water
2. LPG
3. CNG
4. Cooking oil

Q. The given table lists some of the fuels along with their calorific values and ignition temperatures in degree celcius.
$$\begin{array}{ccc}\text{Fuel}& \text{Calorific value (KJ/Kg)}& \text{Ignition temperature}\\ \text{A}& \text{200}& 50\\ \text{B}& \text{250}& 40\\ \text{C}& \text{100}& 70\\ \text{D}& \text{150}& 1000\end{array}$$
Which of the following is an ideal fuel?

1. B
2. A
3. C
4. D

Q. Diesel is an example of a solid fuel.

1. True
2. False

Q.

List any three characteristics of a good fuel. [3 MARKS]

Q.

Define a fuel and give some examples of solid, liquid, and gaseous fuels.

Q.

Which of the following arrangement represents the fire triangle?

1. Oxygen, Fuel and Wood.

2. Hydrogen, Fuel and Light.

3. Oxygen, Fuel and Heat.

4. Hydrogen, oxygen and light.

Q. is used as a fuel for cooking at home.

1. LPG
2. Petrol
3. Diesel

Q. Can chlorine replace oxygen during combustion? If yes then how does it happen? what is the work that chlorine or oxygen does during combustion?

Q. Compare LPG and wood as fuels.

Q.

Give reasons for the following : LPG is a better domestic fuel than wood.

Q. Which one of the following can be considered as a good fuel?

1. Paper
2. Cotton
3. Petrol
4. Water

Q. Assertion: Petrol can not be used as a household fuel for cooking.
Reason: It is highly inflammable in nature.

1. Assertion: Correct
   Reason: Correct
   Reason is the correct explanation of assertion
2. Assertion: Incorrect
   Reason: Correct
3. Assertion: Correct
   Reason: Incorrect
   Reason is the correct explanation of assertion.
4. Assertion: Incorrect
   Reason: Incorrect

Q. Give two reasons why LPG is a better domestic fuel than wood. [2 marks]

Q.

Why the cotton easily burns?

Q. What is a calorific value of a fuel? Write any four characteristics of an ideal fuel.

Q. What are the advantages of using CNG as a fuel?

1. It is lead free
2. It is low ignition temperature
3. It is lead free and reduces pollution
4. It reduces pollution

Q. What can be done to reduce environmental issues caused due to acid rain?

1. Reduce the excessive use of fossil fuels
2. Adding sulphur compounds to fossil fuels
3. Removing sulphur compounds from fossil fuels
4. Increase the use of fossil fuels

Q. Question 4
Compare LPG and wood as fuels.

Q. Which of the following is an inflammable substance?

1. Wood
2. Metal
3. Petrol
4. Straw

Q.

Why do we consider hydrogen as the future of our energy requirements?

1. Substitution for oil & no $C{O}_2$ as exhaust

2. All the above given choices

3. Abundant because the gas can be produced from water & there is no $C{O}_2$ as exhaust

4. High proficiency fuel and no $C{O}_2$ as exhaust

Q. 1. List chemical properties of hydrogen
2. why hydrogen is considered as a clean fuel.

Q.

What is a fuel? On what parameters do we judge whether the fuel is good or not? [5 MARKS]

Q. Which of the following is an inflammable substance?

1. Wood
2. Petrol
3. Metal
4. Straw