Which gas is produced at the cathode during the electrolysis of acidified water?
A. Chlorine
B. Oxygen
C. Ozone
D. Hydrogen
Answer: Option D
Solution (By JKExamLibrary)
At cathode (negative electrode), H⁺ ions are reduced: 2H⁺ + 2e⁻ → H₂(g). At anode (positive), water is oxidized: 2H₂O → O₂ + 4H⁺ + 4e⁻. Overall: 2H₂O → 2H₂ + O₂. The volume of H₂ collected is double that of O₂. Acidified water (with H₂SO₄) enhances conductivity. Platinum electrodes are used.
Explanation:
Ernest Rutherford is generally credited with the discovery of the proton in 1919 through the nuclear reaction: ¹⁴N + α particle → ¹⁷O + proton. Eugen Goldstein earlier observed canal rays (positive rays) which were later identified as protons by Rutherford. Thomson discovered electron, Chadwick neutron. So Rutherford is the accepted discoverer.
Explanation:
Henri Becquerel discovered radioactivity in 1896 while studying uranium salts. Marie and Pierre Curie further investigated radioactive elements. Rutherford studied alpha/beta radiation.
Explanation:
Natural gas (methane) is often found above petroleum deposits, trapped under cap rock. It burns cleaner than coal and oil, producing less CO₂, no SO₂, and minimal particulates. Coal (including lignite) contains more impurities. Peat is an early stage of coal. Natural gas is transported via pipelines or as LNG.
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