Biofuels are produced from biomass—recently living organisms or their metabolic byproducts. Examples: ethanol from sugarcane/corn, biodiesel from vegetable oils, biogas from organic waste. They are renewable and can reduce greenhouse gas emissions compared to fossil fuels. However, large-scale production may compete with food crops. Algae-based biofuels are also being researched.
Explanation:
One carbon atom with four hydrogens is methane (CH₄). Ethane is C₂H₆, propane C₃H₈. Methanol is CH₃OH (alcohol). Methane is the simplest alkane.
Explanation:
Galvanization is coating iron or steel with a thin layer of zinc to prevent rusting. Zinc acts as a sacrificial anode—it corrodes preferentially (being more reactive) even if the coating is scratched, protecting the underlying iron. Tin coating (tin plating) protects only if the layer is intact. Chromium plating provides a shiny surface and corrosion resistance but works differently. Galvanized iron is used for roofing sheets, buckets, etc.
Consider the following statements: 1. Chromatography separates components based on differential adsorption. 2. The component that is more strongly adsorbed moves faster. Which statement(s) is/are correct?
Explanation:
Chromatography is an advanced technique used to separate mixtures based on the differential adsorption of components onto a stationary phase. The component that is more strongly adsorbed to the stationary phase moves slower, not faster. Therefore, only statement 1 is correct, making option A the right choice.
No comments yet. Be the first to start the discussion!