Metals & Ores — Set 1
Chemistry · धातुएं और अयस्क · Questions 1–10 of 50
Which of the following is the principal ore of Aluminium?
Correct Answer: D. Bauxite
Bauxite is the primary ore used for the commercial production of aluminium. It is typically found in tropical and subtropical regions. Most of the world's aluminium is extracted through the Bayer process.
Cinnabar is a mineral ore of which metal?
Correct Answer: D. Mercury
Cinnabar is the bright red sulfide mineral of mercury. It has been used as a pigment since ancient times. Heating this ore is the standard method to release liquid mercury.
The ore known as 'Galena' is primarily composed of which element?
Correct Answer: C. Lead
Galena is the most important ore of lead and often contains silver. It crystallizes in the cubic system and has a metallic luster. Lead is frequently used in batteries and radiation shielding.
Siderite is an ore consisting mainly of which metal?
Correct Answer: D. Iron
Siderite is a valuable iron mineral composed of iron carbonate. It is often found in sedimentary deposits alongside coal. It contains about 48% iron when pure.
Which metal is extracted from the ore 'Pyrolusite'?
Correct Answer: C. Manganese
Pyrolusite is the most common mineral of manganese. It is chemically known as manganese dioxide. Manganese is essential for the production of high-quality steel.
What is the name of the most important ore of Tin?
Correct Answer: B. Cassiterite
Cassiterite is the primary source of tin and has been for thousands of years. It is usually found in hydrothermal veins and alluvial deposits. Tin is widely used for coating other metals to prevent corrosion.
The ore 'Calamine' is used to extract which of these metals?
Correct Answer: B. Zinc
Calamine is a historic name for ores of zinc. It is often found in the oxidized zones of zinc copper deposits. Zinc is famously used in the galvanization of iron.
Which of the following is an ore of Magnesium?
Correct Answer: B. Carnallite
Carnallite is a hydrated potassium magnesium chloride mineral. It serves as an important source for both magnesium and potassium. Magnesium is a very light metal used in aerospace alloys.
Argentite is a major ore of which precious metal?
Correct Answer: C. Silver
Argentite is a lead-grey mineral that is a primary ore of silver. It is also known as silver glance in many geological texts. Silver is known for having the highest electrical conductivity of all metals.
Pitchblende is the primary ore for which radioactive element?
Correct Answer: C. Uranium
Pitchblende is a highly radioactive, uranium-rich mineral. It was used by the Curies to first discover radium and polonium. Most modern nuclear fuel is derived from this ore.