Chemical Compounds and Their Common Names

Sodium hypochlorite is the chemical name for household bleach, a common disinfectant and cleaning agent. Turpentine is a paint solvent, nail polish remover contains acetone, and natural gas is primarily methane.

Dihydrogen monoxide literally means 'two hydrogen, one oxygen' (H2O), which is water. This technical name is often used humorously to make water sound dangerous, but it's simply the systematic chemical name.

This is a duplicate of question 117649. Magnesium hydroxide is both milk of magnesia (a brand name) and a laxative (its function), making option C correct.

Ethylene glycol is the main ingredient in automotive antifreeze, preventing engine coolant from freezing in cold temperatures. It's toxic and not used for car paint, petrol, or windscreen wash.

Sodium chloride is the chemical name for common table salt (NaCl), which is why the hint mentions fries. Pepper, vinegar, and ketchup are different condiments - pepper contains piperine, vinegar is acetic acid in water, and ketchup is a tomato-based sauce.

Mercury is a liquid metal at room temperature that forms small, shiny droplets. These droplets can easily roll and scatter when disturbed, which is why it's historically called 'quicksilver.' The other options (paint, bleach, water) don't share this characteristic behavior.

Nitrous oxide (N2O) is commonly called 'laughing gas' because it induces euphoria and laughter when inhaled. It's used as an anesthetic and analgesic in medical and dental procedures. The other options (alcohol, helium gas, sugar) are different substances entirely.

Trinitrotoluene is a yellow solid explosive compound commonly abbreviated as TNT. It's widely used in military and industrial applications. Nitro-glycerine and dynamite are related explosives, while gun powder is a different explosive mixture.

Vinegar is primarily a solution of acetic acid in water, typically 5-8% concentration. It's the acidic condiment commonly used with fries. Ketchup, salt, and pepper are not acetic acid - ketchup contains vinegar, salt is sodium chloride, and pepper is a spice.

Petrolatum is the chemical name for petroleum jelly, commonly sold under the brand name Vaseline. It's used as a moisturizer and protective barrier for chapped lips and skin. Lipstick, lip gloss, and butter are different products - butter is a food product, not a skin protectant.

Acetylsalicylic acid is the chemical name for aspirin, a common pain reliever and anti-inflammatory drug. Antacids neutralize stomach acid, paracetamol (acetaminophen) is a different pain reliever, and Epsom salts are magnesium sulfate used in baths.

Cream of tartar is the common name for potassium hydrogen tartrate (KC4H5O6), a byproduct of winemaking used in baking. It stabilizes egg whites and acts as a leavening agent. Tartare sauce is a condiment, baking soda is sodium bicarbonate, and yeast is a fungus.

Calcium oxide (CaO) is commonly known as 'quicklime' or simply 'lime' in gardening. Gardeners use it to raise soil pH. Clay is a soil type, nitrate is a nitrogen compound, and chalk is calcium carbonate (different from calcium oxide).

Washing soda is sodium carbonate decahydrate (Na2CO3·10H2O) written as Na2CO3. Baking soda is sodium bicarbonate (NaHCO3). The formulas are correctly matched in option C with washing soda first and baking soda second.

Nitrous oxide (N2O), commonly known as laughing gas, is a colorless, sweet-tasting gas used as an anesthetic and analgesic in dentistry and medicine. It was discovered in 1772 by Joseph Priestley and named 'laughing gas' due to the euphoric effects it produces when inhaled.

Work = force × distance. When rolling up a slope, the effective force needed is reduced (mg sinθ vs mg for vertical lift), so less work is done over the longer distance along the slope compared to lifting vertically.

Blotting paper has numerous tiny pores. Ink rises through these narrow channels due to capillary action - the phenomenon where liquid flows in narrow spaces without external forces, caused by surface tension and adhesive forces.

Nuclear sizes are extremely small (on the order of 10^-15 m). The fermi (fm) is the standard unit for nuclear dimensions - 1 fermi = 10^-15 meters. Angstrom (10^-10 m) is too large for nuclei, while newton and tesla measure force and magnetic field respectively.