The important ore of zinc is: (a) Cryolite (b) Calamine (c) Malachite (d) Gibbsite

Calamine, also known as hemimorphite, is a significant mineral ore from which zinc is extracted. Its chemical formula is typically represented as \( Zn4(Si2O7)(OH)2 \cdot H2O \). This mineral is not to be confused with the lotion of the same name, which is used to treat mild itchiness.

Characteristics of Calamine

Calamine has a number of unique properties that make it easily identifiable. It features a white or colorless streak, a vitreous to pearly luster, and it can be found in a range of colors including white, green, and sometimes even a reddish hue due to impurities.

Extraction of Zinc from Calamine

The extraction process involves the roasting of calamine ore to convert zinc sulfate, followed by the reduction of zinc oxide with carbon. This metal is essential in a variety of industries, including galvanization, the creation of alloys such as brass, and as a component in batteries.

Metals are often extracted from naturally occurring minerals called ores. An ore is usually a compound or mixture of the metal with other elements, from which it is economically and feasibly extractable. The study of metal ores is pivotal in the field of metallurgy—the science of metal extraction and processing.

Each metal has one or more ores associated with it. For example, bauxite and cryolite are ores of aluminium, while magnetite and hematite are important ores of iron. Understanding the different ores is crucial for various applications, including ore beneficiation, pyrometallurgical and hydrometallurgical processes.

Ores are not only industrial treasures but also contribute significantly to a country's economic strength. Knowing where these ores are found and how to efficiently extract metals from them is a fundamental part of the materials and mineral engineering fields.

The National Eligibility cum Entrance Test (NEET) is an essential pre-medical examination in India, which includes a comprehensive Chemistry section. NEET Chemistry is divided into three main parts: Physical Chemistry, Organic Chemistry, and Inorganic Chemistry.

Inorganic Chemistry covers a substantial portion of the syllabus, which includes the study of ores of metals, their properties, and extraction methods. This topic is fundamental for students aspiring to enter the medical field, as it lays the groundwork for understanding the biochemical interactions of minerals in the body.

Questions related to ores, such as the one regarding the important ore of zinc, test the student's ability to recall and apply foundational knowledge of metallic compounds. Consistent practice and a strong grasp of the underlying principles are essential strategies for success in this competitive examination. It goes without saying that a thorough understanding of such basic concepts can significantly increase a student's proficiency in NEET Chemistry.