Chemistry Mix Trivia

1. Used as a white food coloring, white pigment in arts and crafts and as sunscreen, which dioxide is naturally found as rutile and brookite?

From Quiz The Great White Part 7: Chalky Compounds

Answer: Titanium dioxide

You would be unable to find carbon dioxide or chlorine dioxide as a mineral - both are gases at room temperature (and the latter is a very unstable, strong oxidant used as a disinfectant). Silicon dioxide is ubiquitous as quartz and sand, among many other forms, but the substance asked for in this question is titanium dioxide. Its high reflectivity, especially in powdered form (which gives it its white color), can effectively protect an underlying material from light even with a thin layer. In spite of widespread use, some health concerns regarding titanium dioxide, particularly in nanoparticle form, exist. Question submitted by WesleyCrusher.

From Quiz Can You Smell Chemistry Tonight?

Answer: Geosmin

Geosmin has the chemical formula C12H22O, and its name is derived from the Greek words 'geo', meaning 'earth', and 'osmos', meaning 'smell'. Geosmin is formed by cyanobacteria and the gram-positive bacteria 'Streptomyces'. Geosmin can be smelt when it rains on a dry soil. It decomposes under acidic conditions.

From Quiz Basic Chemistry Quiz

Answer: Bases

Metallic hydroxides are called bases. All bases have hydroxide as the only negative radical. They are soapy and bitter in taste. Their pH values are greater than seven and they turn red litmus paper blue.

From Quiz The Uses of Various Chemical Substances

Answer: iodine (I)

A tincture of iodine contains iodine in ethyl alcohol (the solvent), mixed with some potassium iodide (KI). Methyl alcohol is not used as it is poisonous. This solution is reddish brown in colour. When applied on cuts and wounds, iodine, being an antiseptic, helps prevent infections. Iodine can also be used to get relief from pain when it is mixed with petroleum jelly to make a paste.

From Quiz Chemistry!

Answer: cations

An ion is a atom that has either lost or gained electrons. The ions that have the positive charge are called cations. The ions that have the negative charge are called anions. Here is how ions become positively or negatively charged: Ions are atoms with a gain or loss in electrons. The charges depend on the amount of the electrons. The ion is positively charged if it has lost one or two electrons, and therefore becomes a cation. If the ion has gained one or two electrons then it is negatively charged and therefore is an anion.

From Quiz Chemistry Trivia

Answer: 6

Boron has five protons. A neutral boron atom would also contain five neutrons, but isotopes are elements where the amount of neutrons differ from the amount of protons.

From Quiz The Beautiful Logic of Chemistry

Answer: It is an acid

The Bronsted-Lowry definition of an acid is anything that donates a proton. A proton is a hydrogen ion, as a hydrogen atom is (usually) one electron whizzing around one proton. In contrast to an acid, a base is anything which accepts a proton. The trap some may have fallen into is putting "It is an ion" as an answer. True, upon losing a hydrogen ion, many compounds will become ionised themselves (after all, they are losing a positively charged entity and so are likely to be left negatively charged). However, this is not part of the definition of an acid and so cannot be known for certain from the predicate. This answer would only be true if the compound was uncharged to begin with.

From Quiz Keep An Ion It

Answer: hexavalent chromium

The plaintiffs won their lawsuit although the money didn't amount to much per residents near the plant. Erin Brockovich was rewarded with a million dollar check and a job in the law firm. An interesting fact is that Erin did memorize all the phone numbers and addresses of the 600 plus plaintiffs. She claims that she did this because of the learning disability dyslexia.

From Quiz Properties of Solutions

Answer: Homogeneous mixture

All solutions are composed of one substance uniformly dispersed in another, which is a property of homogeneous mixtures. Heterogeneous mixtures consist of a substance not uniformly dispersed through another substance, like sand in water. A compound is a combination of elements that is uniform throughout, while an element is only made up of atoms having the same atomic number or number of protons.

From Quiz On The Bleach

Answer: Sodium Hypochlorite

A solution of 3 to 6 percent of sodium hypochlorite in water is commonly called bleach.

From Quiz Good Practice In the Lab (Analytical Chemistry)

Answer: Your hands will either soak up moisture from or add moisture to the outside of the vessel, which introduces random error.

Although this effect may not be so significant when measuring large quantities of mass, being careful about this can be the difference between 99% yield and 65% yield. The error truly is random. I personally usually remove mass from a beaker by touching it, while other people add mass. My reasoning is because my hands are dry, they may suck up any moisture already present on the outside surface.

From Quiz Think Chemistry

Answer: Lead

The chemical symbol for lead is Pb. This is derived from the Latin "plumbum". Lead is a dull grey metal with atomic number 82.

From Quiz Chemistry

Answer: Balance the charges on each of the components in the compound.

Balancing the charges or counting the number of electrons in the outer shells of the atoms are two ways to find out a formula of an ion. eg. Ba2+ and F1- =BaF2 You should never guess or get the information from the internet, because it is likely to be wrong.

From Quiz Chemistry Questions for the Die-Hard Chem Fan

Answer: Atomic masses listed in the periodic table are weighted averages of isotopic masses.

The atomic masses listed on the periodic table are, actually, average atomic masses. The average atomic mass is the summation of the products of an element's isotopic masses and its relative abundance (in percent). For example, carbon has two common isotopes: C-12 and C-13. C-12 is 98.9% abundant and has a mass of 12.000 amu, whereas C-13 is 1.1% abundant and has a mass of 13.0033 amu. Computing for carbon's average atomic mass: (12.0000 * 0.989) + (13.0033 * 0.011) = 12.011 amu.

From Quiz It's Chemistry Time, Folks

Answer: Physical, Inorganic, Biochemistry, Analytical, and Organic

Physical chemistry deals with applying physics to the study of matter. It's also probably the most important branch. Inorganic chemistry deals with stuff that is chemically composed of elements other than carbon. The branch of Biochemistry concerns itself with living things. Analytical chemistry deals with analyzing and finding out what substances are present in a particular material and how much of each substance is present. Finally, organic chemistry deals with substances that are compounds of carbon.

From Quiz Fun Chemistry

Answer: They conduct electricity.

All metals conduct electricity. It is just that some are good conductors, while some are poor ones. Not all metals are hard, some are in the alkaline metal group and are soft. Most metals form basic oxides, some form amphoteric oxides. Not all metals react with water.

From Quiz It's a Gas!

Answer: fluorine

Early experiments with hydrofluoric acid often ended in tragedy, due to its highly corrosive and toxic nature.

From Quiz A Quick Introduction to Supramolecular Chemistry

Answer: Chemistry beyond the molecule

While it is true that supramolecules are generally large, it is not necessarily true that all supramolecules are. Supramolecular chemistry is primarily concerned with the intermolecular forces between specific molecules. It is said that molecules are to supramolecules as atoms are to molecules.

From Quiz Basic Foundation Chemistry

Answer: The simplest ratio of atoms of each element in a compound

If a formula contains the actual numbers of the atoms, it is known as a molecular formula. For example, the molecular formula of ethane is C2H6, (it contains 2 carbons and 6 hydrogens) but its empirical formula is CH3. The mean mass of the atoms is the Ar, or relative atomic mass, and the sum of the particles in the nucleus is called the mass number.

From Quiz Scientific Knowledge: For the Chemist

Answer: helium and neon

The common red of the supermarket scanner is the combination of helium and neon.

From Quiz Chemistry for Geniuses

Answer: boiling point

A pure compound has a fixed boiling point at a fixed pressure. An impure ester would have a range of boiling points.

From Quiz High level inorganic compounds quiz

Answer: 1 + 2

Fluorine reacts with water much different than the other halogens, 2*F2 + 2*H2O = 4*HF + O2 .

From Quiz Organic and Inorganic Chemistry

Answer: potassium manganate(VII)

Aqeuous iron(II) salts act as a reducing agent, while potassium mangante(VII) is an oxidising agent. The end product of the reaction gives a colorless or pale yellow solution.

From Quiz Some Tough General Chemistry Questions

Answer: no 2 electrons in an atom can have the same four quantum numbers

The correct answer is that no 2 electrons can have the same four quantum numbers. This won Pauli the Nobel prize in 1945.

From Quiz Chemistry

Answer: Bohr

From Quiz Famous Chemists And Chemistry Laws

Answer: Charles's Law

The volume of a confined gas is directly proportional to the absolute temperature, provided that the pressure remains constant.

From Quiz The Great White Part 7: Chalky Compounds

Answer: Magnesium

Magnesium, with the atomic number 12, is the 9th most abundant element in the universe. It is also one of the 11 essential elements in the human body, necessary for proper bone formation, protein synthesis, muscle and nerve function, blood glucose control, and blood pressure regulation. Joseph Black, a Scottish physicist and chemist, discovered magnesium in 1725 and named it for the Greek district of Magnesia. The compound magnesium carbonate is the white substance used by weightlifters and rock climbers to make their hands less slippery. Question submitted by pitegny.

From Quiz Can You Smell Chemistry Tonight?

Answer: Strawberry

Furaneol has the chemical formula C6H8O3. It has two enantiomers, only one of which is responsible for the characteristic 'strawberry' smell. Furaneol is also present, to a small extent, in the smell of pineapples. Furaneol is also soluble in organic solvents. It consists of a pentagonal ring, whose one vertex is an oxygen atom.

From Quiz Is There Something Wrong?

Answer: Yes, salt isn't the right substance - it should be an alkali

An alkali is a substance that gives hydroxyl ion as the only negatively charged ion on dissolving in water. Acid is a substance that gives hydronium ion as the only positively charged ion on dissolving in water. Salt is a substance formed as the product when an acid reacts with a base. Alkali will be the appropriate answer as alkalis are soluble in water and not all bases are.

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Last Updated Nov 16 2024 5:46 AM

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