Description : The main ore of thorium is (A) Pitchblende (B) Monazite sand (C) Limonite (D) Galena
Last Answer : (B) Monazite sand
Description : Which one of the following minerals is found in Monazite sand? (1) Potassium (2) Uranium (3) Thorium (4) Sodium
Last Answer : (3) Thorium Explanation: Monazite is a reddish-brown phosphate mineral containing rare earth metals. It occurs usually in small isolated crystals. There are actually at least four different kinds of monazite, depending on relative ... 5.0 to 5.5 and is relatively dense, about 4.6 to 5.7 g/ cm3.
Description : Which one of the following minerals is found in Monazite sand ? (1) Potassium (2) Uranium (3) Thorium (4) Sodium
Last Answer : Thorium
Description : Which of the following elements is nonradioactive? (1) Uranium (2) Thorium (3) Plutonium (4) Zirconium
Last Answer : (4) Zirconium Explanation: Zirconium is non-radioactive. It is a chemical element with the symbol Zr, atomic number 40 and atomic mass of 91.224. The name of zirconium is taken from the ... important source of zirconium. It is a lustrous, grey-white, strong transition metal that resembles titanium.
Description : Which of the following elements is non-radioactive ? (1) Uranium (2) Thorium (3) Plutonium (4) Zirconium
Last Answer : Zirconium
Description : Which one of the following pairs is NOT correctly matched? (1) Haematite : Copper (2) Bauxite : Aluminium (3) Monazite : Thorium (4) Pitchblende : Uranium
Last Answer : (1) Haematite : Copper Explanation: Haematite is the mineral form of iron oxide (Fe2O3), one of several iron oxides. It is mined as the main ore of iron. Hematite is harder than pure iron, but much more brittle.
Last Answer : Haematite : Copper
Description : Which State of India has the largest reserves of monazite, with a high thorium content? -Do You Know?
Last Answer : answer:
Description : The mineral monazite is a rich source of thorium, available in large quantity in kerala. A typical monazite sample contains 9% `ThO_(2)` and 0.35% `U_
Last Answer : The mineral monazite is a rich source of thorium, available in large quantity in kerala. A typical monazite sample ... B. 0.266 C. 0.366 D. 0.466
Description : Which State of India has the largest reserves of monazite, with a high thorium content? [CPO SI 2002] (a) Kerala (b) Karnataka (c) Gujarat (d) Maharashtra
Last Answer : Ans: (a)
Description : Which State of India has the largest reserves of monazite, with a high thorium content? (1) Kerala (2) Karnataka (3) Gujarat (4) Maharashtra
Last Answer : (1) Kerala Explanation: Monazite is a reddish-brown phosphate mineral containing rare earth metals. It occurs usually in small isolated crystals. Monazite is an important ore for thorium, lanthanum, and ... , which hold 70 per cent-plus of India's estimated monazite reserve of 18 million tonnes.
Description : The most extensive; commercially use- ful source of thorium as monazite sand occurs in India at?
Last Answer : Travancore coast
Description : Which State of India has the largest reserves of monazite, with a high thorium content?
Last Answer : Kerala
Description : Indian monazite sand contains __________ percent thorium. (A) 10 (B) 25 (C) 60 (D) 90
Last Answer : (A) 10
Description : Main source of __________ is monazite sand. (A) Uranium (B) Polonium (C) Hafnium (D) Thorium
Last Answer : (D) Thorium
Description : The most important ore of aluminium is (a) Bauxite (b) Magnetite (c) Haematite (d) Monazite
Last Answer : Ans:(a)
Description : The main ore of uranium is (A) Pitchblende (B) Monazite sand (C) Cassiterite (D) Chalcopyrite
Last Answer : (A) Pitchblende
Last Answer : Thorium ore monazite
Description : Fast breeder test reactor at Kalpakkam (INDIA) is designed for using (A) Thorium as a fertile material (B) U-238 as a fertile material (C) Helium as a coolant (D) Uranium ore directly as a fuel
Last Answer : (A) Thorium as a fertile material
Description : What is the sign of zirconium ?
Last Answer : Zirconium signal Zr.
Description : Which one of the following elements is essential for the construction of nuclear reactors? (1) Cobalt (2) Nicke (3) Zirconium (4) Tungsten
Last Answer : (3) Zirconium Explanation: Zirconium is an essential element for the construction of nuclear reactors.
Description : Which of the following elements is not radioactive? (1) Radium (2) Plutonium (3) Zirconium (4) Uranium
Last Answer : (3) Zirconium Explanation: Zireonium is a lustrous, greywhite, strong transition metal that resembles titanium. Zirconium is mainly used as a refractory and pacifier, although it is used in small amounts as an alloying agent for its strong resistance to corrosion.
Description : Which of the following elements is not radio-active ? (1) Radium (2) Plutonium (3) Zirconium (4) Uranium
Description : Which of the following metals can be obtained from its ore only by electrolysis of a molten salt ? w) cobalt x) chromium y) copper z) sodium
Last Answer : ANSWER: Z -- SODIUM
Last Answer : Zr signal of zirconium
Description : What is the chemical sign of zirconium and what are the main properties of this material?
Last Answer : The chemical symbol for zirconium is Zr. Main properties of zirconium: Electronic structure: [Kr] 4d25s2 Number plate: 40 Atomic mass: 91,224 u 0,002 u Melting point: 1 855 ° C Areas ... in nuclear power plants as a reactor structural material.Zirconium is used in the production of steel .
Description : Should I buy a diamond or cubic zirconium engagement ring?
Last Answer : if you can afford the diamond then go for it because when shopping for engagement rings cost is actually one of the biggest factors and diamond is more expensive and also many people thinks ... then diamonds is the best choice as zirconia captures light differently which makes them shines less.
Description : Assertion : Zirconium can be purificed by Van Arkel method. Reason : `ZrI_(4)` is volatile and decomposed at `1800 K`.
Last Answer : Assertion : Zirconium can be purificed by Van Arkel method. Reason : `ZrI_(4)` is volatile and decomposed at `1800 K`.
Description : How many energy levels contain electrons in an atom of zirconium (Zr)?
Last Answer : 4
Description : Which of the following is a moderating material used in nuclear reactor? (A) Graphite (B) Cadmium (C) Zircaloy (an alloy of zirconium and aluminium)
Last Answer : (A) Graphite
Description : Zircaloy used as a fuel cladding material in a nuclear reactor (thermal) is an alloy of zirconium (A) Tin, nickel, iron and chromium (B) And graphite
Last Answer : (A) Tin, nickel, iron and chromium
Description : Carbide tipped cutting tools are manufactured by powder metallurgy techniques and have a composition of (A) 90% tungsten carbide and 10% cobalt (B) 70% aluminium oxide & 30% silica (C) 30% nickel, 15% chromium & 55% tungsten (D) 65% tungsten & 35% zirconium
Last Answer : Option A
Description : Principal alloying elements of cast tool alloys which have very high wear resistance & high temperature strength are (A) Cobalt, chromium & tungsten (B) Cobalt, chromium & nickel (C) Molybdenum, tungsten & chromium (D) Cobalt, zirconium & molybdenum
Last Answer : : Option A
Description : __________ has the highest melting point out of the following. (A) Tungsten (B) Zirconium (C) Molybdenum (D) Tantalum
Description : Pick up the metal refractory from the following: (A) Molybdenum (B) Tungsten (C) Zirconium (D) All of these
Last Answer : Answer: Option D
Description : Of the following, which non-fissioning element is used in the cooling water of nuclear power plants to help control the rate of the fission reaction by absorbing neutrons: w) zirconium x) boron y) krypton z) cesium
Last Answer : ANSWER: X -- BORON
Description : Which mineral is found in monazite sand? -General Knowledge
Description : What is the composition of zircon , monazite , butyl etc. ?
Last Answer : Black gold is made up of zircon , monazite , butyl etc.
Description : Monazite sample contains 9% `ThO""_(2)` and 0.35% `U""_(3)O""_(8).Pb""^(208)` and `Pb""^(206)` are the stable and products in the radioactive decay se
Last Answer : Monazite sample contains 9% `ThO""_(2)` and 0.35% `U""_(3)O""_(8).Pb""^(208)` and `Pb ... C. It is a fertile material D. It belongs to 4n series
Description : The monazite sands on the Kerala coasts, used for generating nuclear energy contain – (1) platinum (2) copper (3) uranium (4) bauxite
Last Answer : (3) uranium Explanation: Monazite sands contain uranium.
Description : Uranium percentage in monazite sand is about (A) 0.01 (B) 0.25 (C) 1.2 (D) 7
Last Answer : (B) 0.25
Description : Which of the following is used as a moderator in nuclear reactors? (1) Thorium (2) Graphite (3) Ordinary water (4) Radium
Last Answer : (2) Graphite Explanation: Graphite is used a moderator in nuclear reactors.
Description : The heaviest naturally occurring element is: (1) Mercury (2) Poloni (3) Thorium (4) Uranium
Last Answer : (4) Uranium Explanation: The heaviest element in terms of heaviest per a given number of atoms is the element with the highest atomic weight. This is the element with the larg st number of ... man-made. The heaviest naturally-occurring element is uranium (atomic number 92, atomic weight 238.0289).
Description : An element that does not occur in nature but can be produced artificially is – (1) thorium (2) radium (3) plutonium (4) uranium
Last Answer : (3) plutonium
Description : Which of the following caused radioactive pollution along the coast of Kerala? (1) Plutonium (2) Zinc (3) Thorium (4) Radium
Last Answer : (3) Thorium Explanation: Thorium-rich monazite sand deposits on the Kerala coast have been responsible for natural radioactive contamination. It has been pronounced on the south-west coastal line of ... been found to have elevated levels of background radioactivity due to high abundance of thorium.
Description : Which of the following elements does not exhibit natural radioactivity? (1) Uranium (2) Thorium (3) Aluminium (4) Polonium
Last Answer : (3) Aluminium Explanation: Uranium, Thorium and Polonium are radioactive elements which do not have stable naturally occur-ring isotope. Aluminium is a silvery white, soft, ductile metal. It is the third ... element (after oxygen and silicon), and the most abundant metal in the Earth's crust.
Description : Which adioactive pollutant has recently drawn the attention of the public due to its occurrence in the building materials? (1) Radium (2) Radon (3) Thorium (4) Rlutonium
Last Answer : (3) Thorium Explanation: Thorium, a naturally occurring radioactive element, four times more abundant than uranium in the earth's crust.
Description : The long range potential of nuclear energy in India depends on its reserves of – (1) thorium (2) uranium (3) plutonium (4) radium
Last Answer : (2) uranium Explanation: India's domestic uranium reserves are small and the country is dependent on uranium imports to fuel its nuclear power industry. Since early 1990s, Russia has been a major supplier of nuclear fuel-to India.
Description : Which one of the following is not a radioactive element? (1) Uranium (2) Thorium (3) Radium (4) Cadmium
Last Answer : (4) Cadmium Explanation: Radioactivity refers to the particles which are emitted from nuclei as a result of nuclear instability. Because the nucleus experiences the intense conflict between the two ... show radioactive properties while the fourth one does not show any kind of radioactive properties.
Description : Uranium eventually decays into a stable isotope of — (1) Radium (2) Thorium (3) Lead (4) Polonium
Last Answer : (3) Lead Explanation: Natural uranium consists of three major isotopes: U238 (99.28% natural abundance), U235 (0.71%), and U234 (0.0054%). All three are radioactive, emitting alpha particles, with ... has 18 members, all of which eventually decay into Pb206, by a variety of different decay paths.