Doubtly
@Doubtly · Joined Feb 2021
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- Explain with diagram step-by-step energy conversion in a. Thermal power plant In a thermal power plant: chemical energy of coal → heat energy → kinetic energy of steam → mechanical energy of turbine → electrical energy... 1
- What are the advantages and limitations of solar energy? Solar energy is free, renewable and pollution-free, but it is available only in daytime, depends on the weather and needs costly equipment a... 1
- How can we get the required amount of energy by connecting solar panels? By connecting solar panels in series (to increase voltage) and in parallel (to increase current), we can make a solar array that gives the r... 1
- Saving energy is the need of the hour. Saving energy is the need of the hour because the demand for energy is rising fast while fossil fuel reserves are limited and their use poll... 1
- Energy obtained from fossil fuels is not green energy Energy from fossil fuels is not green energy because burning them pollutes the environment and the fuels are non-renewable. Burning coal, pe... 1
- What is meant by green energy? Which energy sources can be called as green energy sources and why? Give example. Green energy is energy obtained from sources that do not harm the environment, that is, sources which produce no (or very little) pollution... 1
- Explain the difference Thermal electricity generation and solar thermal electricity generation Both use heat to make steam that turns a turbine; the difference is the source of the heat. Thermal electricity generationSolar thermal elec... 1
- Explain the difference Conventional and Non-conventional Sources of energy. Conventional sources are the traditional, mostly non-renewable sources used on a large scale (coal, petroleum, natural gas); non-conventiona... 1
- Solve the following crossword puzzle. a. Maximum energy generation Answers: a. Thermal (coal); b. Solar (or wind); c. Green; d. Kinetic; e. Potential a. Most of India's electricity is generated in thermal po... 1
- Which type/types of power generation involve maximum number of steps of energy conversion? In which power generation is the number minimum? Maximum steps: thermal (coal), nuclear and solar thermal power plants. Minimum steps: solar photovoltaic cells. Follow the chain of energy c... 1
- Other than thermal power plant, which power plants use thermal energy for power generation? In what different ways is the thermal energy obtained? Nuclear power plants and solar power plants, used thermal energy for power generation other than thermal power plants. Different ways of gen... 1
- Remake the table taking into account relation between entries in three columns. Solution :: I II III Coal Thermal Energy Thermal plant Uranium Nuclear Energy Nuclear power plant Water Reservoir Potential energy Hydro ele... 1
- Which fuel is used in thermal power plant? What are the problems associated with this type of power generation? Coal is used as a fuel in thermal power plant. Coal contains Chemical energy. Upon burning coal releases heat energy. This heat energy is us... 1
- An element has a face-centred cubic (fcc)structure with a cell edge of a. The distance between the centres of two nearest tetrahedral voids in the lattice is : Correct Answer is a/2 In FCC, tetrahedral voids are located on the body diagonal at a distance of (a√3/4) from the corner. Together they for... 1
- Which among the following pairs of Vitamins is stored in our body relatively for longer duration ? Correct Option is B) Vitamin A and Vitamin D Explaination : Vitamins which are soluble in fat and oils but insoluble in water are fat-solubl... 1
- In a 0.2 molal aqueous solution of a weak acid HX, the degree of ionisation is 0.3. Correct answe is d ) −0.418 °C 2
- Three complexes, [CoCl(NH3 )5] 2+(l) , [Co(NH3 )5H2O]3+(ll) and [Co(NH3 )6] 3+(lll) absorb light in the visible region. Option A (I) > (II) > (III) is correct Explaination:: In a coordination compound, the strong field ligand causes higher splitting of the d-o... 1
- The possible number of geometrical isomers for the complex [CoL2Cl2 ] - (L = H2NCH2CH2O- ) is (are) Answer is 5 2