10 most difficult acids riddlesChemistry quiz
What is exactly the pH value of distilled water?
It depends on the temperature
Pure water is about 7 at 25 °C; this value decreases with increasing temperatures. At 50 °C, it is 6.55. It is also worth to note, that water that has been exposed to air is mildly acidic, because it absorbs carbon dioxide from the air.
What is the effect of nicotinic acid on human organism?
it is neutral
It is harmful, causes cancer
It is highly toxic, kills in 10 seconds
It is essential for functioning
Nicotinic acid, better known as niacin or vitamin B3, has nothing in common with tobacco. Chronic lack of niacin leads to pellagra, a vitamin deficiency disease.
Hydrofluoric acid is a very strong, reactive and corrosive acid. Which material is resistant?
Hydrofluoric acid is a precursor to almost all fluorine compounds, including: fluoxetine (Prozac), PTFE (Teflon).It is a colourless solution that is highly corrosive, capable of dissolving many materials, especially oxides. Because of its high reactivity toward glass and moderate reactivity toward many metals, hydrofluoric acid is usually stored in plastic containers.
What is H₂SO₂ ?
Nitric acid (III)
Sulfoxylic acid (H2SO2) (also known as hyposulfurous acid or sulfur dihydroxide)) is an unstable oxoacid of sulfur in an intermediate oxidation state between hydrogen sulfide and dithionous acid. It consists of two hydroxy groups attached to a sulfur atom.
What is the strongest known acid?
Fluoroantimonic acid is an ionic liquid created by reacting hydrogen fluoride with antimony pentafluoride in stoichiometrically equivalent amounts. The 1:1 combination forms the strongest known superacid, 10^16 (10 quadrillion) times stronger than 100% sulfuric acid.
Which acid is used for the production of explosives?
Nitric acid is the primary reagent used for nitration - the addition of a nitro group. Nitration reactions are notably used for the production of explosives, for example synthesis of nitroglycerine, the conversion of guanidine to nitroguanidine and the conversion of toluene to trinitrotoluene (TNT).
Which acid belongs to the carboxylic acids?
Acetic acid (CH3COOH) has a carboxylic group (COOH). Carbonic acid (H2CO3), nitric acid (HNO3) and hydrochloric acid (HCL) of this group do not.
Which acid causes the sourness of green apples?
Malic acid is more sour than citric acid, and is the source of extreme tartness in so-called extreme candy. Malic acid occurs naturally in all fruits and many vegetables.
What is the common name for acetylsalicylic acid?
Aspirin has an antiplatelet effect. Low doses of aspirin may be given immediately after a heart attack to reduce the risk of another heart attack or of the death of cardiac tissue.