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The order of increasing basicity of TiO(...

The order of increasing basicity of `TiO_(2), Zro_(2)` & `HfO_(2)` is -

A

`TiO_(2)lt ZrO_(2)lt HfO_(2)`

B

`HfO_(2)lt ZrO_(2)lt TiO_(2)`

C

`HfO_(2)lt TiO_(2)lt ZrO_(2)`

D

`ZrO_(2)lt TiO_(2)lt HfO_(2)`

Text Solution

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The correct Answer is:
A
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CHHAYA PUBLICATION-D - AND F - BLOCK ELEMENTS -MCQ (Single Correct Type)
  1. At pH = 12, Cr(2)O(7)^(2-) changes to -

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  2. In the presence of X, ZnO develops a light blue colouration in CH(3)CO...

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  3. The order of increasing basicity of TiO(2), Zro(2) & HfO(2) is -

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  4. The reaction between NH(4)Cl solution and alkaline Nessler's reagent f...

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  5. Ti^(2+) is brown while Ti^(4+) is colourless, because -

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  6. If excess of KCN is added to a solution containing Cu^(2+) and Cd^(2+)...

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  7. Which one of the following precipitate is not white -

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  8. The salt of the d - block element that is used as a catalyst in the di...

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  9. The metal chloride that responds to the chromyl chloride test is -

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  10. Theamount of nickel present in steel, used in the manufacture of pendu...

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  11. The formula of mangano - manganic oxide resembles to -

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  12. The value of magnetic moment is the same for -

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  13. In dichromate ion, the measure of Cr - O - Cr angle is -

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  14. The number of electrons present in the 5f - orbital in the ground stat...

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  15. Gold dissolves in aqua regia to form -

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  16. A chocolate - brown precipitate is obtained when acetic acid and potas...

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  17. The aqueous solutions having the same colour are observed in case of -

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  18. Free silver metal reacts with NaCN and forms a water soluble complex i...

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  19. In alkaline medium, MnO(4)^(-) oxides I^(-) to -

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  20. The d - block elements have coloured ions because of -

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