CNG stands for Compressed Natural Gas. It is primarily methane stored at high pressure. It is considered a cleaner fuel than petrol or diesel because it produces fewer pollutants like carbon monoxide and unburnt hydrocarbons, and it leaves no residue upon combustion.
Explanation:
A molecule is the smallest particle of a compound (or element) that can exist independently and exhibit the compound's chemical properties. For covalent compounds (water, CO₂), the molecule is the discrete particle. For ionic compounds, the term 'formula unit' is used rather than molecule. Atoms are smallest particles of elements. Ions are charged atoms/molecules.
Explanation:
Smelting involves heating a metal oxide ore (roasted or calcined) with a reducing agent like coke (carbon) or CO to obtain the metal in the molten state. Example: Fe₂O₃ + 3CO → 2Fe + 3CO₂ in blast furnace. Calcination: heating carbonate/ hydroxide ore in absence of air. Roasting: heating sulfide ore in excess air. Leaching: chemical dissolution of ore. Smelting is a key pyrometallurgical step.
Explanation:
(NH₄)₂SO₄ contains 21% nitrogen and 24% sulfur. Both are plant nutrients. It is a straight nitrogenous fertilizer with sulfur as secondary nutrient. It is especially useful for sulfur-deficient soils.
No comments yet. Be the first to start the discussion!