The chemical formula of bleaching powder is: MCQ with Answer and Explanation

Explanation:
Hydrogen is considered the cleanest fuel because its combustion produces only water (2H₂ + O₂ → 2H₂O) and no greenhouse gases or toxic pollutants. Coal, wood, and diesel produce CO₂, CO, SO₂, and particulate matter, contributing significantly to air pollution and global warming.

Explanation:
From Faraday's first law, m = ZQ, so Z = m/Q. SI unit is kg/C, but practical unit is g/C. It is the mass of substance liberated per unit charge.

Explanation:
Stainless steel contains at least 10.5% chromium, which reacts with oxygen to form a thin, adherent, transparent Cr₂O₃ layer (passive film) that prevents further oxidation of the underlying metal. Nickel enhances corrosion resistance and ductility. This self-healing oxide layer makes it 'stainless'. Unlike galvanization, the protection is not sacrificial but barrier-type from the inherent alloy composition.