Sudarshan Gurjar is teaching live on Unacademy Plus
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"Methanol has been promoted as an alternative transportation fuel from time to time over the past forty years". Which of the following statements regarding Methanol is not correct? (a) It can be produced from natural gas. (b) It is a biodegradable fuel. (c) Similar to hydrocarbon fuels, it is not soluble in water. (d) It can be blended with ethanol and gasoline.
.Option (c) is not correct Methanol, like ethanol but unlike hydrocarbon fuels, is water soluble . As a consequence, it is transported through diffusion and convection through the environment at much faster rate than hydrocarbons. In addition to fast migration, methanol bio- degrades much faster than hydrocarbons. Fast transport and degradation result in short lifetimes. . Hydrocarbons, on the other hand, comprise many stable compounds, which include some, such as aromatics, that are highly toxic to bio-organisms and degrade slowly hghly ms and degnade slowiyt
Which of the following is/are the emissions from coal combustion at thermal power plants? 1. Mercury 2. Particulate matter 3. Oxides of Sulphur Select the correct answer using the code given below. (a) 1 only (b) 2 and 3 only (c) 1 and 3 only (d) 1, 2 and 3
Answer D Coal fired thermal power plants are one of the main contributors for atmospheric pollution and greenhouse gases. Emissions that come from these plants could be categorized into three different categories: Gaseous emissions Carbon Dioxide, Carbon Monoxide, Sulphur Dioxide and Nitrogen Dioxide which lead to global warming and acid rain. .Particulate matter emissions - this fine dust that is emanated from the stacks of power plants is a health hazard Trace elements like Mercury, Cadmium and Lead which are also health hazards.
Off-grid Renewable Energy can be a game changer as it can provide energy to isolated communities and areas. Which of the following can be used as a part of such system? 1. Biomass gasifiers 2. Micro hydro projects 3. Solar Photo Voltaic Roof-top Systems Select the correct answer using the code below (a) 1 and 2 only (b) 2 and 3 only (c) 1 and 3 only (d) 1, 2 and 3