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Which of the statements regarding Monazite sands is correct? 1. Monazite is radioactive due to the presence of thorium. 2. It is a principle source of some rare earth metals.

Which of the statements regarding Monazite sands is correct? 1. Monazite is radioactive due to the presence of thorium. 2. It is a principle source of some rare earth metals. Correct Answer Both 1 and 2

The correct answer is Both 1 and 2.

Important Points

  • Monazite is a reddish-brown phosphate mineral containing rare earth metals. It occurs usually in small isolated crystals.
  • Lanthanum is the most common rare earth element in monazite. So, statement 1 is correct.
  • Monazite is radioactive due to the presence of thorium and, less commonly, uranium.
  • Because of its radioactive nature, monazite is a useful for radiometric dating of geological events, such as crystallization, heating, or deformation of the rocks containing monazite. So, statement 2 is also correct.
  • Thorium extracted from Monazite sands can be used for generation of nuclear power.

Related Questions

With reference to India, consider the following statements : 1. Monazite is a source of rare earths. 2. Monazite contains thorium. 3. Monazite occurs naturally in the entire Indian coastal sands in India. 4. In India, Government bodies only can process or export monazite. Which of the statements given above are correct ?
To meet its rapidly growing energy demand, some opine that India should pursue research and development on thorium as the future fuel of nuclear energy. In this context, what advantage does thorium hold over uranium? 1. Thorium is far more abundant in nature than uranium. 2. On the basis of per unit mass of mined mineral, thorium can generate more energy compared to natural uranium. 3. Thorium produces less harmful waste compared to uranium. Which of the statements given above is/are correct?    
To meet its rapidly growing energy demand some opine that India should pursue research and development on thorium as the future fuel of nuclear energy. In this context, what advantage does thorium hold over uranium?
1. Thorium is far more abundant in nature than uranium.
2. On the basis of per unit mass of mined mineral, thorium can generate more energy compared to natural uranium.
3. Thorium produces less harmful waste compared to uranium.
Which of the statement(s) given above is/are correct?
To meet its rapidly growing energy demand, some opinion that india should pursue research and development on thorium as the future fuel of nuclear energy. In this context, what advantage does thorium hold over uranium?
1. Thoriumis farmore abundant in nature than uranium.
2. On the basis of per unit mass of mined mineral, thorium can generate more energy compared to natural uranium.
3. Thorium produces less harmful waste compared to uranium.
Which of the statements given above is/are correct?
Which of the following statements are true?
1. All radioactive elements decay exponentially with time.
2. Half-life time of radioactive elements is the time required for one-half of the radioactive atoms to disintegrate.
3. Age of the earth can be determined by radioactive dating.
4. Half-life time of a radioactive element is fifty percent of its average life period.
Select the correct answer:
The following question consists of six sentences of a passage. The first and the sixth sentences are given in the beginning as S1 and S6. The middle four sentences in each have been jumbled up and labelled P, Q, R and S. You are required to find the proper sequence of the four sentences and mark your response accordingly. S1 : One of the many young scientists who chose to throw in their lot with Rutherford was an Oxford physical chemist, Frederick Soddy. S6 : We now know that Gamma rays are a particularly fierce form of X-rays. P : His association with Rutherford lasted only two years, but that was long enough to change the whole face of physics. Q : He was just 23. R : They found that thorium changed into a new element , thorium X, and in the process gave off what was apparently a gas and at the same time a third type of ray, which they named after the Greek letter ‘Gamma’. S : When he teamed up with Rutherford, they investigated thorium which, as Marie Curie had shown, was radioactive. The proper sequence should be
In the following items, each passage consists of six sentences. The first and the sixth sentence are given in the beginning as S1 and S6. The middle four sentences in each have been removed and jumbled up. These are labeled P, Q, R and S. You are required to find out the proper sequence of the four sentences and mark your response accordingly on the Answer Sheet. S1 :One of the many young scientists who chose to throw in their lot with Rutherford was an Oxford physical chemist, Frederick Soddy.
S6:We now know that Gamma rays are a particularly fierce form of X-rays.
P:His association with Rutherford lasted only two years, but that was long enough to change the whole face of physics.
Q:He was just 23.
R:They found that thorium changed into a new element, thorium X, and in the process gave off what was apparently a gas and at the same time a third type of ray, which they named after the Greek letter Gamma.
S:When he teamed up with Rutherford,they investigated thorium which, as Marie Curie had shown, was radioactive. The proper sequence should be
Recently, there has been a concern over the short supply of a group of elements called 'rare earth metals.' Why? 1. China, which is the largest producer of these elements, has imposed some restrictions on their export. 2. Other than China, Australia, Canada and Chile, these elements are not found in any country. 3. Rare earth metals are essential for the manufacture of various kinds of electronic items and there is a growing demand for these elements. Which of the statements given above is/are correct?
In the question below are given three statements followed by four conclusions numbered I, II, III, IV. You have to take the given statements to be true even if they seem to be at variance with commonly known facts. Read all the conclusions and then decide which of the following conclusions logically follows from the given statements disregarding commonly known facts. Statements: All sands are golds. No silver is a gold. Some silvers are leads. Conclusions: I) No sand is a gold. II) Some leads are not golds. III) Some sands are silvers. IV) Some leads are sand.
Nuclear wastes is waste that contains radioactive material. Radioactive material is normally a by product of nuclear power generation. Radioactive waste is regulated by government agencies in order to protect human health and the environment. Radioactivity naturally decays over time, so radioactive waste has to be isolated and confined in appropriate disposal facilities for a sufficient period until it no longer poses a threat. Which of the following statements can be inferred from the paragraph?