Science M.C.Q

Both fission and fusion are nuclear reactions that produce energy, but the applications are not the same. Fission is the splitting of a heavy, unstable nucleus into two lighter nuclei, and fusion is the process where two light nuclei combine together releasing vast amounts of energy.

Pollutants pollute the air and lead to various kinds of diseases such as respiratory problems, problems leading to lungs, skin, and eyes. Polluted air leads to asthma also.

Thermal power plants use only coal, oil or gas as fuel.

Solar cells are made of semiconductors.

A good fuel should have a high calorific value so that it can give us more heat per unit mass. It should also have a moderate ignition temperature.

Diesel is used to drive heavy vehicles.

In both reactions, neutrons can be produced.

Butane is the main constituent of petroleum gas.

Nuclear fusion reactions are the source of the sun's energy.

It takes millions of Years of the formation of fossil fuels. So, they cannot be renewed in near future.

Wood has the lowest calorific value among the given fuels.

In solar cooker, glass sheet is responsible for greenhouse effect because glass sheet in solar cooker is used for capturing the energy by sun which results in trapping of energy and the energy gets accumulated inside which increases the increase in temperature resulting in greenhouse effect. It helps in generation of heat which can be used for various purposes.

On land, when trees are buried inside the earth millions of years ago and due to high temperature and pressure, these get converted into coal.
Diesel is formed from crude oil, which is formed from the plants and aquatic animals in the oceans when buried for millions of years.

The sun's energy is derived from the fusion of hydrogen nuclei into helium nuclei.

Liquid sodium or carbon dioxide gas is used as a coolant.

in both the reactions, heat energy is released owing to the conversion of mass into energy.

Coke is majorly used in the extraction of the metals from their ores. It is used as a reducing agent. Hence, coke is more valuable in metal extraction industry, when used as a reducing agent.

Biogas is a renewable source of energy.

In nuclear physics and nuclear chemistry, nuclear fission is a nuclear reaction or a radioactive decay process in which the nucleus of an atom splits into smaller, lighter nuclear.

Coke cannot be obtained from biomass.

In a hydroelectric power plant more electrical power can be generated if water falls from a greater height because greater height means larger potential energy, and this larger amount of potential energy is converted into larger kinetic energy.

Infrared rays make sunlight warm. The warmth of sunlight is used in a solar cooker.

Coke is used as a reducing agent in the extraction of metals from their ores.

A special grade of kerosene oil is used as aviation fuel in jet aero planes.

Other than dry cells, i.e., the battery cells, all three devices have been invented to generate, store or directly utilize solar energy. whereas, Dry cells generate energy from a chemical reaction.

Coal, natural gas and petroleum are all fossil fuels while biomass is source of energy available from organic matter like plants and animal wastes.

Solar energy leads to least environmental pollution in the process of its harnessing and utilization.
In case of nuclear energy, the major concerns of pollution are while storage and disposal of spent fuels where there is always a risk of leakage of radiation.
In case of thermal energy, enormous amount of air pollution is produced.
Even in case of geothermal energy a little amount of pollution is produced.

Major problem in harnessing nuclear energy is ,how to dispose its residue which is highly radioactive in nature. It requires proper waste disposal mechanism.