Energy Conversion from One Form to Another

Q.

Name the energy transformation taking place in the following device: a car engine

Q.

Imagine that all the exhaustible natural resources are exhausted by human activities. Do you think the survival of living beings would be possible? If yes, why? If not, why not?

Q.

Why petrol is used for light vehicle, and diesel for heavy vehicle

Q.

Why do things burn in presence of oxygen? Why don't they burn without it?

Q.

Give two examples each of solid fuels, liquid fuels and gaseous fuels.

Q. Choose the incorrect statement from the following.​

A good fuel is one which:​

1. is readily available.​
2. produces a large amount of heat.​
3. leaves behind many undesirable substances.​
4. burns easily in the air at a moderate rate.​

Q.

Combustion is an oxidation process.

1. False

2. True

Q. Question 12
Can the process of rusting be called combustion? Discuss.

Q. Can the process of rusting be called combustion? Discuss.

Q. Which of the following indicates the steps of biogas formation?

1. Organic waste, anaerobic digesiton, biogas
2. Industrial waste, aerobic digesiton, biogas
3. Organic waste, burning, biogas
4. Industrial waste, anaerobic bacteria, biogas

Q.

Explain how food is a fuel. [3 MARKS]

Q.

Which one of the following measures in the 3R's means to use resources judiciously?

1. Reuse

2. Replace

3. Recycle

4. Reduce

Q.

Write any four characteristics of an ideal fuel.

Q.

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

Q.

Give two examples each of solid fuels, liquid fuels and gaseous fuels.

Q. energy sources are naturally replenished.

1. Renewable
2. Non-renewable
3. Conventional

Q.

The renewable sources of energy are also called non-conventional sources of energy.

1. True
2. False

Q.

Is water a fuel ?

Q. Can Combustion of methane be expressed in the form of oxidation number? How?

Q. Match the following:
$$\begin{array}{cc}Objects& EnergyConversions\\ 1Bicycle& aSu{n}^{\prime }senergytoelectricalenergy\\ 2Engine& bMuscularenergytomechanicalenergy\\ 3Windturbine& cHeatenergytomechanicalenergy\\ 4Solarpanel& dWindenergytoelectricalenergy\end{array}$$

1. 1-c, 2-b, 3-d and 4-a
2. 1-b, 2-c, 3-d and 4-a
3. 1-b, 2-c, 3-a and 4-d
4. 1-c, 2-a, 3-d and 4-b

Q. Match the following:
$$\begin{array}{cc}Objects& EnergyConversions\\ 1)Bicycle& a)Su{n}^{\prime }senergytoelectricalenergy\\ 2)Engine& b)Muscularenergytomechanicalenergy\\ 3)Windturbine& c)Heatenergytomechanicalenergy\\ 4)Solarpanel& d)Windenergytoelectricalenergy\end{array}$$

1. 1-b, 2-c, 3-a and 4-d
2. 1-c, 2-a, 3-d and 4-b
3. 1-b, 2-c, 3-d and 4-a
4. 1-c, 2-b, 3-d and 4-a

Q. When people use the word 'fuel', many associates it with petrol or diesel filled in cars because we know that cars need fuel to run. Other cases where fuel is used are:

1. Used for home applications such as heating and cooking.
2. Produce steam to run an engine.
3. Produce electricity in thermal power plants.
4. All of these

Q.

Which of the following statements is correct with respect to natural resources?

1. They are always exhaustible.

2. They are always inexhaustible.

3. They may be exhaustible or inexhaustible.

4. They are not always eco-friendly.

Q.

What are the different forms of energy?

Q. Which of the following statements are correct when you are riding a bicycle?

1. The energy provided from the digestion of food is used to move the bicycle.
2. The bicycle moves without spending your energy.
3. The bicycle converts your energy into its motion.
4. Kinetic energy is involved in this process.

Q. Match the following:
$$\begin{array}{cc}Objects& EnergyConversions\\ 1)Bicycle& a)Su{n}^{\prime }senergytoelectricalenergy\\ 2)Engine& b)Muscularenergytomechanicalenergy\\ 3)Windturbine& c)Heatenergytomechanicalenergy\\ 4)Solarpanel& d)Windenergytoelectricalenergy\end{array}$$

1. 1-c, 2-b, 3-d and 4-a
2. 1-b, 2-c, 3-d and 4-a
3. 1-c, 2-a, 3-d and 4-b
4. 1-b, 2-c, 3-a and 4-d

Q. The three R's to save the environment are:

1. Recycle, Replace, Reuse
2. Recycle, Replace, Reduce
3. Reduce, Recycle, Reuse
4. Reduce, Replace, Reuse

Q.

Write any four characteristics of an ideal fuel.

Q. Which one of the following fuels is used in most of the vehicles in recently?

1. Wood
2. Coal
3. Diesel
4. Charcoal

Q. Match the following:
$$\begin{array}{cc}Objects& EnergyConversions\\ 1)Bicycle& a)Su{n}^{\prime }senergytoelectricalenergy\\ 2)Engine& b)Muscularenergytomechanicalenergy\\ 3)Windturbine& c)Heatenergytomechanicalenergy\\ 4)Solarpanel& d)Windenergytoelectricalenergy\end{array}$$

1. 1-b, 2-c, 3-d and 4-a
2. 1-c, 2-a, 3-d and 4-b
3. 1-b, 2-c, 3-a and 4-d
4. 1-c, 2-b, 3-d and 4-a