An alloy is a mixture of metals or a mixture of a metal and another element.Alloys are defined by metallic bonding character.An alloy may be a solid solution of metal elements (a single phase) or a mixture of metallic phases (two or more solutions). Intermetallic compounds are alloys with a defined stoichiometry and crystal structure.he term alloy is used to describe a mixture of atoms in which the primary constituent is a metal. The primary metal is called the base, the matrix, or the solvent. The secondary constituents are often called solutes.
Marl or marlstone is a calcium carbonate or lime-rich mud or mudstone which contains variable amounts of clays and silt.
Description in detail [edit]. The marla is a traditional unit of area that was used in Pakistan, India,and Bangladesh. The marla was standardized under British rule to be equal to the square rod, or 272.25 square feet, 30.25 square yards, or 25.2929 square metres. As such, it was exactly one 160th of an acre. The definition of marla varies between India and Pakistan. In India, the unit was standardized to 25 square yards. Its use in India is in decline, with the guz, square meter, acre and hectare being the more commonly used units. Bangladesh uses the same definition of marla as in India.