Acids and Bases

Substances with pH below 7 are acidic because they have a higher concentration of hydrogen ions (H+) than pure water. A base would have a pH above 7, while pH 7 is neutral.

'Oil of Vitriol' is the historical archaic name for sulphuric acid (H₂SO₄), given by medieval alchemists due to its oily appearance and vitriolic (corrosive) nature. Nitric acid, acetic acid, and citric acid are different acids with distinct properties.

Lead-acid car batteries use sulfuric acid (H2SO4) as the electrolyte. This is a standard automotive fact - sulfuric acid facilitates the chemical reactions between lead plates to generate electrical energy.

H2SO4 is sulfuric acid (misspelled as Salphuric in option B). It's a strong mineral acid used in batteries, fertilizer production, and chemical manufacturing. Water is H2O, hydrochloric acid is HCl, and carbon is an element, not a compound.

LSD stands for Lysergic Acid Diethylamide, which is a potent psychedelic drug. The correct spelling is 'diethylamide' (one word, with 'di' meaning two and 'ethyl' referring to the ethyl groups). Options A and D incorrectly split the word or misspell 'diethylamide'.

All acids contain hydrogen ions (H+) as their essential component. When an acid dissolves in water, it releases hydrogen ions, which is what gives acids their characteristic properties like sour taste and ability to turn litmus red.

Oleum, also known as fuming sulphuric acid, is sulphuric acid with excess sulphur trioxide dissolved in it. Its chemical formula is H2S2O7. When oleum is diluted with water, it produces regular sulphuric acid. The term 'fuming' refers to the white fumes it releases when exposed to moist air due to SO3 release.

Aqua Regia is a highly corrosive mixture of concentrated hydrochloric acid (HCl) and nitric acid (HNO3) in a 3:1 ratio by volume. It is one of the few substances that can dissolve gold and platinum, making it invaluable in gold refining and analytical chemistry. The nitric acid acts as an oxidizer while hydrochloric acid provides chloride ions to form soluble chloroaurate complexes.

Oil of vitriol was the historical name for sulphuric acid, used by alchemists and early chemists. The term 'vitriol' comes from Latin 'vitreolus' meaning glass-like, referring to the glassy appearance of hydrated sulphate crystals. Blue vitriol is copper sulphate, green vitriol is iron sulphate.

Milk contains lactic acid, which is produced when bacteria ferment lactose (milk sugar). Fresh milk contains very little lactic acid, but it increases as milk sours or ferments into products like yogurt. Oxalic acid is found in spinach, citric acid in citrus fruits, and boric acid is not naturally found in food.

Carbonic acid (H2CO3) is responsible for carbonation in soft drinks. When CO2 dissolves in water under pressure, it forms carbonic acid, which creates the 'fizz' and tingling sensation. Citric acid adds flavor but not fizz, acetic acid is in vinegar, and oxalic acid is toxic.

Sulfuric acid (H2SO4) is historically known as 'Oil of Vitriol.' The term 'vitriol' refers to sulfate salts, and sulfuric acid was the most important. Hydrochloric acid is 'muriatic acid,' and neither hydroiodic nor nitric acid have this common name.

Vinegar is very dilute acetic acid (typically 4-8% acetic acid in water). Citric acid is in citrus fruits, carbonic acid is in carbonated water, and phosphoric acid is in some dark sodas but not vinegar.

Sulfuric acid is used in lead-acid car batteries as the electrolyte. When the battery discharges, it reacts with lead plates to form lead sulfate. Hydrochloric and nitric acids are too corrosive and reactive for this use, and phosphoric acid is used in some rust removal but not standard car batteries.

Nitric acid has the formula HNO3, containing one hydrogen, one nitrogen, and three oxygen atoms. H2SO4 is sulfuric acid, CO is carbon monoxide, and CH4 is methane.