Consider the following with respect to Rare Earth Elements 1 ...........

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Consider the following with respect to Rare Earth Elements

1. Rare earth elements (REE) are a group of seventeen chemical elements that occur together in the periodic table.

2. They are plentiful in the Earth ’s crust.

3. Japan is the biggest producer of Rare Earth Elements.

Which of the statements given above is / are correct?

1 only

2 only

1 and 3 only

1, 2 and 3

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Explanation:

1. Rare earth elements are a set of seventeen chemical elements in the periodic table , specifically the fifteen lanthanides plus scandium and yttrium.

2. They are plentiful in the Earth’s crust.

3. Economically exploitable REE concentrations are generally found in uncommon types of ig neous rocks such as carbonatites and alkaline rocks.

4. Rare Earths are characterized by high density, high melting point, high conductivity and high thermal conductance . These unique properties make them indispensible for a variety of emerging and critical technology applications relevant to India’s energy security. i.e. clean energy technology, defense and civilian application etc.

5. China holds the leading position among producers of the rare earths

6. In India monazite is the principal source of rare earths and Kerala, Orissa and Tamil Nadu account for nearly 95% of the country’s production of rare earths.