Industrialization demands more energy. To fulfil these demands, fossil fuels are used as they are readily available. It has an influence on the environment due to its rigorous use. Excessive usage...
Advantages are: A solar cooker gets its heat from the sun. It is a nonpolluting, renewable, and unlimited energy source. It will be cost-effective due to its endless supply. Disadvantages are:...
The qualities of an ideal source of energy are: Is economicalIs easily availablePollution freeEasy to transport and storeAmount of energy produced on burning is huge.
a) Renewable and non-renewable: Renewable energy sources are those that replenish themselves and are abundant in nature. Solar energy, tidal energy, wind energy, and bio-mass are examples....
To harvest energy from the tides, the sun, moon, and earth must be in perfect alignment, and the tides must be extremely strong.
The wind: Windmills are used to capture wind energy. Windmills require a speed of more than 15 km/h to create electricity, which is one of the constraints of wind energy. And there will be more...
Biomass is derived from the decomposition of dead plants and animals. It is a renewable energy source. Wood and gobar-gas are examples of bio-mass energy sources. The potential energy of stored...
Fossil fuels are derived from the remains of deceased plants and animals in the earth's crust. They are similar to coal and petroleum in that they are readily available. These are non-renewable...
c) Nuclear energy Nuclear fusion and nuclear fission are both sources of nuclear energy. Nuclear fission occurs when uranium atoms are attacked by low-energy neutrons, causing the atom to divide...
c) Nuclear energy Dead plants and animal wastes are used to create bio-mass. There is a chemical change in these dead plants and animals as they mix with water and sunlight. Nuclear energy, on the...
b) A cloudy day Solar energy is used to heat water in a solar water heater. On a cloudy day, the sunlight will be insufficiently powerful and dazzling, thus it will be reflected back into the sky by...
The following are the two non-renewable energy sources: Wood: Forests are the source of timber. The number of forests is decreasing as a result of deforestation. We all know that growing a forest...
The following are the two renewable energy sources: Wind: Wind energy is obtained from the air which is blowing at a high speed. Windmills capture wind energy and convert it to electricity. The...
Because CNG contains hydrocarbons, hydrogen gas is cleaner. CNG contains carbon, which is a pollutant. Hydrogen, on the other hand, is waste-free, and hydrogen fusion produces no waste. As a result,...
There is no such thing as a pollution-free energy source. On the other hand, solar cells are considered pollution-free. However, their production may harm the ecosystem. There is no waste generated...
The advantages of nuclear energy are as follows: Amount of energy produced per unit mass is large.It is clean because it does not produce pollutants.The energy produced by fissioning one atom of...
The energy obtained from the earth is referred to as geothermal energy. The energy comes from hot spots that form as molten materials at the earth's core are forced to the crust. In geothermal power...
The following are some of the limitations of ocean energy: The tidal energy is affected by the relative positions of the earth, the sun, and the moon.High dams are required for converting tidal...
The heat source for a solar cooker is sunlight for both heating and cooking. The purpose of a mirror is to reflect and focus light at a single point. So, a concave mirror can be utilized in a solar...
Wind energy was captured earlier by employing windmills to accomplish mechanical activities like lifting or collecting water from a well. Windmills, on the other hand, are now used to generate...
Fossil fuels are non-renewable sources of energy, i.e. they are not available in large quantities and cannot be replenished. So we need to find alternate sources of energy. If not controlled, fossil...
Disadvantages of fossil fuels are as follows: Air pollution is caused by fossil fuels such as coal and petroleum because large amounts of pollutants are released.When a fossil fuel is burned, gases...
Natural gas can be utilized for heating and cooking for the following reasons: Easy to use 2. Easily available 3. Easily transportable 4. Does not produce a lot of smoke on burning. 5. HIghly...
When a fuel is readily available and gives a substantial amount of heat energy when burnt, it is said to be a good fuel.
Following are the properties of a good source of energy: It's economical 2. It's easy to store and transport 3. It's easily available 4. It's work done per unit volume or mass should be...
d) Which fossil fuels were formed by the buried remains of small plants and animals? e) Which fossil fuel was formed by the buried remains of large land plants? Answer – c) The sun is regarded...
b) Describe how fossil fuels were formed. Answer – a) Fossil fuels are natural fuels that are created deep beneath the earth's surface from prehistoric species' remains. Fossil fuels include coal,...
Answer: LPG is an odourless material that can nonetheless be detected by its odour due to the addition of mercaptan to the LPG. The actions to take in the event of an LPG leak in the kitchen are as...
Answer: LPG is a better fuel than coal because when coal is burned, dangerous gases are released, however when LPG is burned, no harmful gases are generated..
Answer: Because of its calorific value and lack of hazardous gas production, LPG is considered a good fuel. LPG also has a high calorific value.
Answer: LPG is utilised as a source of energy for heating food since it has a high calorific value and produces smokeless flames.
Answer: Increasing the efficiency of the combustion process and developing strategies to decrease the discharge of toxic gases and ashes into nature are two steps that can be taken to control...
Answer: Increasing the efficiency of the combustion process and, developing strategies to decrease the discharge of toxic gases and ashes into nature are two steps that can be taken to control...
Answer: When fossil fuels are burned, acidic gases such as sulphur dioxide and nitrogen dioxide are released. Acid rain is caused by these chemicals, which harm trees, buildings, and plants while...
Answer: The following are some of the disadvantages of burning fossil fuels: a) Acidic gases are produced when fossil fuels are burned. b) The amount of smoke produced is higher, as is the amount of...
Answer: Heat is generated in thermal power plants by burning coal, which is then used to boil water and create steam. When high-temperature, high-pressure steam is introduced to turbines, it causes...
Answer: Traditional sources of energy are the traditional sources of energy that a great number of people are familiar with. Wood and coal are examples of traditional energy sources.
Answer: Natural gas is regarded as an excellent fuel since it has a high calorific value and burns with a smokeless flame, producing no hazardous fumes.
Domestic gas cylinders like Indane contain mainly …… Answer: Butane
Answer: CNG these days is being used as a fuel in transport vehicles which results in lesser air pollution.
Answer: The two most important uses of natural gas are as follows: It is utilised as a fuel in thermal power plants and transportation vehicles.
Answer: Butane is the component which is found in natural gas as well as in biogas.
a) petroleum gas? b) natural gas? Answer: a) The main constituent of petroleum gas is butane b) The main constituent of natural gas is methane
Answer: a) Full form of LPG is Liquefied Petroleum Gas b) Full form of CNG is Compressed Natural Gas
Answer: Compressed Natural Gas is used in transport vehicles such as cars and buses.
Answer: Liquefied petroleum gas is composed of butane with smaller amounts of propane and ethane.
Answer: Petroleum gas, diesel, kerosene, and petrol are the fractions derived from petroleum that are used as fuels.
Answer: Coal, gas, and oil are the different fuels utilised in the generation of electricity in a thermal power station.
Answer: Kerosene is a hydrocarbon fraction derived by fractional distillation of petroleum and used as a household fuel.
Answer: Liquified Petroleum Gas is an example of a good domestic fuel.
Answer: The product of petroleum that is used to drive heavy vehicles is Diesel.
a) coal b) petroleum gas c) biogas d) natural gas Answer: c) biogas Biogas is a renewable source while rest are non-renewable
a) high calorific value b) no emission of smoke c) smooth burning d) high ignition temperature Answer: d) high ignition temperature High ignition temperature leads to system instability and...
a) more of carbon but less of hydrogen b) less of carbon but more of hydrogen c) equal proportions of carbon and hydrogen d) less of carbon as well as less of hydrogen Answer: b) less of...
a) coal b) wood c) charcoal d) kerosene Answer: b) wood
a) natural gas b) methane gas c) hydrogen gas d) biogas Answer: c) hydrogen gas
a) 50 years b) 25 years c) 45 years d) 15 years Answer: d) 15 years
a) biogas b) methane gas c) hydrogen gas d) natural gas Answer: b) methane gas
a) high calorific value and low ignition temperature b) high calorific value and high ignition temperature c) high calorific value and moderate ignition temperature d) low calorific value and...
a) wind b) flowing water c) fossil fuels d) fuel wood Answer: c) fossil fuels Fossil fuels once exhausted can not be replenished.
a) wood b) alcohol c) hydrogen gas d) natural gas Answer: d) Natural gas Natural Gas once exhausted can not be replenished.
a) petrol b) natural gas c) biogas d) kerosene Answer: c) biogas Only biogas is replenishable.
Answer: Fuel-A i) It has a low calorific value of 55kJ/g, which is a drawback. ii) The ignition temperature is 80°C, which is moderate and advantageous. iii) No hazardous gases are created, which is...
b) What are the characteristics of an ideal fuel or good fuel? Answer: a) A fuel is a material that is burned to generate heat energy. The five types of fuels are wood, LPG, coal, kerosene, and...
Answer: Because coal takes longer to accumulate than growing trees, it is regarded a non-renewable source of energy. Whereas wood is considered a renewable source of energy. As a result, utilising...
Coal, wind, tides, petroleum, wood , natural gas b) What is the basis of above classification? Answer: Wind, tides, and wood are examples of renewable energy sources. Coal, petroleum, and natural...
Answer: Petroleum and coal are the only non-renewable sources of energy. This is due to the fact that they cannot be reclaimed once they have been fully utilised.
Answer: Air and water are renewable energy sources since they are abundant in nature and may be used repeatedly.
Answer: Fossil fuels are classified as non-renewable source of energy since once these are used completely these cannot be replenished.
Answer: The difference between a renewable and a non-renewable energy source is that a renewable energy source is abundant in nature, but a non-renewable energy source is finite. Overuse of...
Answer: A renewable energy source is described as a source of energy that is abundant in nature and may be used for an indefinite amount of time; it never runs out. Solar and wind energy are two...
Answer: A non-renewable energy source is described as one that will deplete rapidly if used for an extended length of time. These energy sources are only found in small amounts in nature. Coal and...
Answer: The following four properties will characterise a good source of energy: a) It's simple to store and move. b) The energy is simple to handle and secure. d) There is a lot of energy...
Answer: A source of energy is one from which a sufficient amount of energy can be obtained over an extended period of time. The two primary categories of energy sources are as follows: a) Renewable...
The amount of heat produced by burning a unit mass of a fuel completely is known as its ………. value. Answer: Calorific value.
Answer: When a fuel's ignition temperature is 80 degrees Celsius, it signifies that the fuel's lowest temperature for catching fire and burning is 80 degrees Celsius.
Answer: A fuel's ignition temperature is defined as The minimal temperature at which it must be heated in order to catch fire and begin burning.
Answer: A fuel's ignition temperature is defined as the minimal temperature at which it must be heated in order to catch fire and begin burning.
Coal or LPG Answer: Because LPG has a larger calorific value than coal, it will create more heat per unit mass when burned.
Answer: Cooking gas has a calorific value of 50kJ/g, which indicates that if 1 gramme of LPG is totally burned,...
Answer: The quantity of heat produced by totally burning 1 gramme of fuel is referred to as the calorific value of the fuel.
Answer: Other than fossil fuels, nuclear fuels such as uranium are a non-renewable source of energy.
a) methane b) ethane c) butane d) propane Answer: The correct answer is c) butane
a) methane b) ethane c) propane d) butane Answer: The correct answer is a) methane
a) nitrogen oxides b) sulphur oxides c) sodium oxides d) carbon oxides Answer: The correct answer is c) sodium oxides
a) petrol b) kerosene c) petrol d) CNG Answer: The correct answer is c) petrol
a) diesel b) kerosene c) petrol d) CNG Answer: The correct answer is b) kerosene
a) moon b) earth c) sun d) sea Answer: The correct answer is c) sun
a) kerosene oil b) cow-dung cakes c) CNG d) coal Answer: The correct answer is b) cow-dung cake
a) coal b) uranium c) natural gas d) fuel oil Answer: The correct answer is b) uranium
a) butane b) ethane c) butanone d) methane Answer: The correct answer is a) butane
a) as a fuel for industrial boilers b) as an oxidizing agent c) as a reducing agent d) as a fuel in domestic ovens Answer: The correct answer is c) as a reducing agent
a) coal gas b) electricity c) oil d) charcoal Answer: The correct answer is d) charcoal
a) nitrogen monoxide b) sulphur dioxide c) carbon monoxide d) carbon dioxide Answer: The correct answer is c) carbon monoxide
a) a sunny day b) a cloudy day c) a hot day d) a windy day Answer: The correct option is b) a cloudy day
a) kinetic energy possessed by stored water is converted into electrical energy b) electricity is extracted from water c) water is converted into steam to turn turbines and produce electricity d)...
a) plane mirror reflector b) black coating inside the box c) glass sheet cover d) utensils placed in the cooker box Answer: The correct option is c) glass sheet cover
a) conductors b) insulators c) semiconductors d) superconductors Answer: The correct option is c) semiconductors
a) 1.4kWh b) 1.4kW/m c) 1.4kW/m2 d) 1.4kW/m3 Answer: The correct option is c) 1.4kW/m2
a) visible light rays b) ultraviolet rays c) cosmic rays d) infrared rays Answer: The correct option is d) infrared rays
a) transparent plastic sheet b) shining aluminum sheet c) butter paper sheet d) transparent glass sheet Answer: The correct option is d) transparent glass sheet
a) 15km/h b) 25km/h c) 35km/h d) 45km/h Answer: The correct option is a) 15km/h
The correct option is c) 5040kJ Given that $\begin{array}{l}\text { Solar constant }=1.4 \mathrm{~kW} / \mathrm{m}^{2}=1.4 \mathrm{~kJ} / \mathrm{s} / \mathrm{m}^{2} \quad\left(\text { converted }...
a) the solar cooker is not placed in the shade b) the glass sheet cover of solar cooker is not closed c) a convex mirror reflector is not used d) the food containers of insulating material are not...
a) wood b) biogas c) atomic energy d) cow-dung Answer: The correct option is c) atomic energy
a) wind energy b) geothermal energy c) fossil fuels d) ethane Answer: The correct option is b) geothermal energy
a) butane b) methane c) propane d) ethane Answer: The correct option is b) methane
a) hydrogen b) butane c) hydrogen sulphide d) methane Answer: The correct option is d) methane
a) burning of diesel b) burning of coal c) burning of charcoal d) burning of wood Answer: The correct option is c) burning of charcoal
a) solar cells b) windmills c) nuclear power d) tidal power Answer: The correct option is c) nuclear power
a) sun b) earth c) moon d) mars Answer: The correct option is c) moon
a) cow-dung b) water c) oxygen d) anaerobic bacteria Answer: The correct option is c) oxygen
a) firewood b) cow-dung cakes c) coke d) charcoal Answer: The correct option is c) coke
a) hydroelectricity b) sewage gas c) natural gas d) gobar gas Answer: The correct option is c) natural gas\
a) fission of radioactive materials b) burning of coal inside the coal mines c) combustion of natural gas deep inside the earth d) fusion of radioactive substance Answer: The correct option is a)...
a) thermal power b) tidal power c) hydro power d) geothermal power Answer: The correct option is c) hydro power
a) displacement of people b) production of methane c) occurrence of floods d) ecological disturbance Answer: The correct option is c) occurrence of floods
a) liquid sodium b) boron c) graphite d) carbon dioxide Answer: The correct option is c) graphite
a) steel b) graphite c) uranium d) boron Answer: The correct option is d) boron
a) liquid mercury and nitrogen dioxide b) liquid sodium and carbon dioxide c) liquid ammonia and carbon monoxide d) liquid boron and uranium oxide Answer: The correct option is b) liquid sodium and...
a) which cools the hot, spent steam to condense it back to water b) which transfers heat from reactor to water in heat exchanger c) which is boiled to make steam to turn the turbine d) which cools...
a) wind energy b) nuclear energy c) biomass energy d) ocean thermal energy Answer: The correct option is b) nuclear energy
a) 931 eV b) 9.31 MeV c) 1 MeV d) 931 MeV Answer: The correct option is d) 931 MeV
a) nuclear diffusion b) nuclear fission c) nuclear fusion d) nuclear fermentation Answer: The correct option is b) nuclear fission
a) 1.6 × 10-14 J b) 1.6 × 10-12 J c) 1.6 × 10-19 J d) 1.6 × 10-13 J Answer: The correct option is c) 1.6 × 10-19 J
a) protons b) deuterons c) electrons d) neutrons Answer: The correct option is d) neutrons
a) atom bomb b) power plants c) sun d) pacemaker Answer: The correct option is c) sun
a) 9 × 1016 J b) 9 × 1014 J c) 9 × 1015 J d) 9 × 1013 J Answer: The correct option is d) 9 × 1013 J
a) conversion of hydrogen gas into helium b) conversion of carbon fuel into carbon dioxide c) burning of hydrogen gas present in the sun d) disintegration of uranium into barium and krypton Answer:...
a) nuclear power plant b) hydrogen bomb c) thermal power station d) atom bomb Answer: The correct answer is d) atom bomb
a) 1.6 × 10-13 J b) 1.6 × 10-19 J c) 1.6 × 10-16 J d) 1.6 × 10-15 J Answer: The correct option is a) 1.6 × 10-13 J Explanation: When an electron with a charge of 1.6 × 10-19 J Coulomb is accelerated...
a) ocean thermal energy b) nuclear fusion energy c) geothermal energy d) nuclear fission energy Answer: The correct option is b) nuclear fusion energy
a) too heavy b) highly inflammable c) extremely foul smelling d) highly radioactive Answer: The correct option is d) highly radioactive
a) conversion of stored chemicals into energy b) conversion of momentum into energy c) conversion of mass into energy d) conversion of magnetism into energy Answer: The correct option is c)...
a) uranium b) deuterium c) barium d) krypton Answer: The correct option is b) deuterium Deuterium is formed by the fusion of two Hydrogen atoms.
a) hydrogen as fuel b) biomass energy c) ocean energy d) fossil fuels Answer: The correct option is d) fossil fuels. Burning of fossil fuels results in the release of many harmful...
a) 200 years b) 400 years c) 500 years d) 100 years Answer: The correct option is a) 200 years
a) coal b) uranium c) petroleum d) natural gas Answer: The correct answer is c) petroleum because petroleum is a non renewable resource and it can't be replenished once exhausted...
a) DLF b) CFL c) FCL d) LPG Answer: The correct option b)...
Reasons for the need to harness non-conventional sources of energy: 1. The conventional sources are the source of energy which is depleted and will soon wear out. 2. The non-conventional energy...
(a) Sun can be taken as an inexhaustible source of energy (b) There is infinite storage of fossil fuel inside the earth (c) Hydro and wind energy plants are non-polluting sources of energy (d) Waste...
(a) sun leads to heating of the upper layer of the atmosphere (b) burning of fossil fuels release oxides of carbon, nitrogen and sulphur in the atmosphere (c) electrical charges are produced due to...