Practice MCQ Questions and answers on General Science-GK

Natural rubber is a protein.

Wood is the main raw material for the manufacture of paper.

Rayon is chemically labelled cellulose acetate, which is a polymer of a semi-synthetic type. It is called semi-synthetic because it has a natural cellulose portion that in combination with acetate gives cellulose acetate (rayon).

Optical fibers are used most often as a means to transmit light between the two ends of the fiber and find wide usage in fiber-optic communications, where they permit transmission over longer distances and at higher bandwidths (data transfer rates) than electrical cables.

Leather is a durable and flexible material created by tanning animal rawhide and skins. The major ingredient of leather is Collagen.

Soap is a salt of a fatty acid used in a variety of cleansing and lubricating products. In a domestic setting, soaps are surfactants usually used for washing, bathing, and other types of housekeeping. In industrial settings, soaps are used as thickeners, components of some lubricants, and precursors to catalysts.

Common salt help in separating soap from the solution after saponification by decreasing solubility of soap.

Vulcanization is a chemical process in which the rubber is heated with sulphur, accelerator and activator at 140–160°C. The process involves the formation of cross-links between long rubber molecules so as to achieve improved elasticity, resilience, tensile strength, viscosity, hardness and weather resistance.

Cobalt is a very intense glass colorant and very little is required to show a noticeable amount of colour. Colour of Cobalt glass is blue.

Glass is made of the mixture of sand and silicates.