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Which lanthanoid compound is used as a m...

Which lanthanoid compound is used as a most powerful liquid lasers after dissolving it in selenium oxychloride? a)Cerium oxide b)Neodymium oxide c)Promethium sulphate d)Ceric sulphate

A

Cerium oxide

B

Neodymium oxide

C

Promethium sulphate

D

Ceric sulphate

Text Solution

Verified by Experts

The correct Answer is:
B
Neodymium oxide
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BRILLIANT PUBLICATION-THE D- AND F-BLOCK ELEMENT-LEVEL-II (ASSERTION-REASON TYPE)
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  2. Assertion : Zn, Cd and Hg are not considered as transition metals. R...

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  3. Assertion : Anhydrous copper (II) chloride is covalent while anhydrous...

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  4. Assertion : All the members of actinide series are radioactive in natu...

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  5. Assertion : Transition metals show variable valency. Reason : Transi...

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  6. Assertion : Silver fluoride is soluble in water. Reason : Hydration ...

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  7. Assertion : Magnetic moment values of actinides are lesser than the th...

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  8. Assertion : MnO is basic whereas Mn2O7, is acidic. Reason : Higher ...

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  9. Assertion . The reaction of oxalic acid with acidified KMnO4 proceeds ...

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  10. Assertion : In transition elements, radii of 5d series are virtually t...

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  11. Assertion : The maximum oxidation state of chromium in its compounds i...

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  12. Assertion : Magnetic moment of Mn^(2+) " is less than that of " Cr^(2+...

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  13. Assertion : In the series Sc to Zn, the enthalpy of atomisation of zin...

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  14. Assertion : In acidic medium, K2 Cr2 O7 " exists as " Cr2 O7^(2-) (ora...

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  15. Assertion : Zr and Hf occur together in nature and are difficult to se...

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  16. Assertion : The second ionization energies of " "(23) V,""(24)Cr and...

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  17. Assertion": Mn'atom loses ns electrons first during ionization as comp...

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  18. Assertion : In Cr2O7^(2-) ion, all the Cr-O bond lengths are equal. . ...

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  19. Assertion : The purple colour of KMnO4, is due to the charge transfer ...

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  20. Assertion : Atomic size of silver is almost the same as that of gold. ...

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  21. Assertion : Actinoids show larger number of oxidation states than lant...

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