Chemistry Quiz 5

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.

Chlorophyll is the natural compound present in green plants that gives them their colour. It consists of a central magnesium atom surrounded by a nitrogen-containing structure called a porphyrin ring; attached to the ring is a long carbon-hydrogen side chain, known as a phytol chain. Calcium is not a component of chlorophyll.

Specific heat is defined by the amount of heat needed to raise the temperature of 1 gram of a substance 1 degree Celsius (°C). Lithium has the highest specific heat capacity of any solid element.

Soap is prepared by boiling caustic soda with Fats. Soap is prepared by hydrolyzing fat under alkaline (basic) conditions. The reaction is called saponification, and produces one molecule of glycerin and three molecules of soap, for each molecule of fat taken.

Dichlorodifluoromethane (CCl₂F₂) is sold under the brand name Freon-12. Freon is a non-combustible gas that is used as a refrigerant in air conditioning applications. It is a non-corrosive gas belonging to the class of chlorofluorocarbons (CFCs).

Copper sulphate (CuSO₄) is used for destroying Fungi in water tanks. It can kill bacteria, algae, roots, plants, snails and fungi.

Ester has a fruity smell due to its volatile nature caused by its chemical composition and conformations. The aroma of an ester is produced when alcohol combines with a carboxylic group (carbon bonded with oxygen atoms). Esters smell partly because they exhibit weak intermolecular forces.

Due to the formation of Lactic acid, milk gets sour when it is left in open for some time. Milk contains a sugar called lactose. It also contains harmless bacteria called lactobacillus, which uses lactose for energy and creates lactic acid as a by-product.

The noble gas used in radiotherapy is radon (Rn). Radon is a heavy radioactive gas of Group 18 (noble gases) of the periodic table, generated by the radioactive decay of radium.

Denatured spirit is ethanol mixed with Pyridine. It is ethanol that has additives to make it poisonous, bad-tasting, foul-smelling, or nauseating to discourage its recreational consumption.