Chemistry questions This is a list of recently added questions about chemistry. Play chemistry quiz and see all the questions. Chemical formula of hydrogen peroxide is ...H₂O₂. Hydrogen peroxide is the simplest peroxide. In its pure form, it is a colourless liquid, slightly more viscous than water. It was first obtained by Louis Thénard in 1818 in the reaction of barium peroxide with nitric acid.Created by: Katarzyna Dąbrowskavery easy 87% CO₂CO₂83H₂O₂H₂O₂2545CH₄CH₄185H₂O₄H₂O₄90water riddles » How many patents was Marie Curie granted?None. Marie and Peter Curie refrained from patenting their newly developed methods to let the humanity benefit from these inventions. Created by: smyruvery hard 32% sevenseven481twotwo1862oneone142nonenone1204physics riddles » How can you cut a diamond?Using a diamond. Diamond is a hardest substance in the world and hence as a very strong bonding between the atoms. hence it can be cut only by using a diamond Created by: Shruthi Srinivasaneasy 78% using a knifeusing a knife107using a diamondusing a diamond6858using goldusing gold300using a gasusing a gas1490materials riddles » What is the chemical formula of dry ice also known as cardice?CO₂. Dry ice is the solid form of carbon dioxide. In temperatures above −78.5 °C (−109.3 °F) it will not melt but sublimate, that means transforming straight from solid form into gas one without liquid phase.Created by: Justa87hard 45% H₂OH₂O694CO₂CO₂2312CH₄CH₄889HCOOHHCOOH1210nature riddles » What is dry ice?Solidified CO2. Dry ice is used in refrigeration. It has an interesting property: it maintains a constant temperature of -78.5C in a warmer environment. This is because dry ice does not melt and sublimes directly into the gaseous form.Created by: Niezgodnavery easy 93% glacierglacier465solidified CO2solidified CO213481legendary alchemical substancelegendary alchemical substance305meringue dessertmeringue dessert205ice riddles » Which substance is the most bitter?Denatonium benzoate. Denatonium, usually available as denatonium benzoate and as denatonium saccharide, is the most bitter chemical compound known, with bitterness thresholds of 0.05 ppm for the benzoate and 0.01 ppm for the saccharide.Created by: Bartoszhard 42% salicinsalicin894absintheabsinthe2002denatonium benzoatedenatonium benzoate3035benzoic acidbenzoic acid1153cuisine riddles » What is the chemical symbol of mercury?Hg. The Latin name of mercury is "hydrargyrum" (meaning liquid silver - quicksilver), hence the symbol Hg. Ru is the chemical symbol of ruthenium, Rh - rhodium, Mt - meitnerium.Created by: globalquiz.orgvery easy 83% RuRu328RhRh743HgHg5937MtMt91chemical elements riddles » What is the chemical symbol of manganese?Mn. Mg is the chemical symbol of magnesium. Mo is the chemical symbol of molybdenum.Created by: globalquiz.orgvery easy 80% MgMg757MoMo79MnMn4812MaMa336chemical elements riddles » What is the chemical symbol of tin?Sn. The Latin name of tin is "stannum", hence the symbol Sn. Ti is the chemical symbol of titanium. Sb is the chemical symbol of antimony.Created by: globalquiz.orgvery easy 86% TiTi307TT203SnSn5343SbSb326chemical elements riddles » What is the chemical symbol of silver?Ag. The Latin word for silver is "argentum", hence the symbol Ag. S is the chemical symbol of sulfur, Si - silicon, Au - gold.Created by: globalquiz.orgeasy 78% SS97SiSi204AuAu995AgAg4608chemical elements riddles » Play chemistry quiz and see all the questions.