Chemistry Quiz 5

Vinegar made by fermentation from cane sugar contains acetic acid. Vinegar is an aqueous solution of acetic acid and trace compounds that may include flavorings. It typically contains 5–8% acetic acid by volume. Usually, the acetic acid is produced by a double fermentation, converting simple sugars to ethanol using yeast, and ethanol to acetic acid by acetic acid bacteria.

Ruby and sapphire are precious gemstones, made of Aluminium Oxide (Al₂O₃) with trace amounts of elements such as iron, titanium, chromium, vanadium, or magnesium.

The main gases responsible for the greenhouse effect include carbon dioxide, methane, nitrous oxide, and water vapor (which all occur naturally), and fluorinated gases (which are synthetic). Bacteria are responsible for both the production and consumption of greenhouse gases such as carbon dioxide (CO₂), nitrous oxide (N₂O) and methane (CH₄).

Cobalt oxide (Co₃O₄) imparts a deep blue colour to the glass. Before the glass can cool and solidify, cobalt can be added to the mixture to give the glass a deep blue colour.

An emulsion is a colloid of a liquid in a liquid. It is a mixture of two or more liquids that do not normally mix together.

Flint glass is optical glass that has relatively high refractive index and low Abbe number (high dispersion). For this reason, it is used for making the lens and prism.

An element which does not react with oxygen is Helium. The noble metals or inert gas do not react with oxygen. Helium (He), argon (Ar), neon (Ne), krypton (Kr), xenon (Xe), and radon (Rn), etc. are common inert gases.

Galvanizing is a process of coating iron or steel with zinc in order to provide greater protection against corrosion for the iron or steel base.

Diamond and Graphite are allotropes. Allotrope refers to one or more forms of a chemical element that occur in the same physical state. Graphite, charcoal, and diamond are all allotropes of carbon.

Curie point, also called Curie Temperature (T_C) is the temperature at which certain magnetic materials lose their magnetic properties.