Test: Chemistry Importance - September 21, 2022 - NEET MCQ

The drug AZT is used for preventing or treating AIDS, while cisplatin & taxol are for cancer and codeine is a sort of painkiller. The drug AZT is also known as Zidovudine. This drug AZT is an antiretroviral drug. It’s used along with other drugs as a combination.

Atoms & Molecules are the basic constituents because the matter is made up of molecules and a molecule is made of atoms. Ions are either positively or negatively charged particles. Nuclei are the central part of atoms. When seen in the microscopic level, atoms are the basic unit of matter.

In rusting of iron, the oxidation state of iron changes, but in the conversion of water to ice, crumpling a sheet of aluminum foil and casting silver the chemical state remains same whereas the physical state changes. When iron is exposed to oxygen, iron oxide formation takes place.

Sushruta Samhita is written by Sushruta, It’s in Sanskrit and contains text about various medicinal sciences and surgical procedures. It’s an old ancient book of India. It has great historical importance as it contains the detailed procedures and the proper instruments needed.

Alchemy is the study of how a substance changes to other substances. It’s a very old study. In olden days, it used to be done in secrecy and was a mystery. It’s related to magic and astrology. The main thing practitioners concentrated in alchemy was turning lead into gold.

“Elixir” is a magical or medical potion, that is used to prolong life to an infinite extent. This is one of the main purposes of the study of chemistry in olden days. It grants the person who drinks it with eternal life or youth. It’s sometimes equated with the philosopher’s stone.

Varahmihir’s Brihat Samhitha is about how glutinous material is prepared and applications of it on roofs and walls of houses and temples. Ajanta and Ellora’s walls look bright for ages only because the science mentioned in this book. It contains the science of using fruits, plants, etc to paint.

Seeds of Manhua plant and oil of Eranda along with calcium carbonate were used in making soaps around the 18^th century in India as per history records.

Heterogeneous substance is a mixture of different components non-uniformly. Homogeneous substances is a uniform mixture of substances. A pure substance has a fixed composition. Whereas elements are composed of only one substance.

Mixture is a combination of pure substances in a ratio. Pure substances which are in its composition are called its components. Atom is the basic unit of life.