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Which of the following oxides are basic ...

Which of the following oxides are basic ?

A

`Mn_2O_7 and V_2O_3`

B

`V_2O_3 and CrO`

C

`CrO and Cr_2O_3`

D

`V_2O_5 and V_2O_3`

Text Solution

Verified by Experts

The correct Answer is:
B
In case of transition metal oxides, the oxides with metals in lower oxidation states are basic in nature. ltbRgt O.S. of Mn in `Mn_2O_7=+7, V" in "V_2O_3= +3, V " in " V_2O_5 = +5`, Cr in CrO and `Cr_2O_3` transition metal ion is in lower oxidition state but `Cr_2O_3` is amphoteric in nature.
Hence `V_2O_3` and CrO are basic in nature.
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NCERT FINGERTIPS-THE D- AND F- BLOCK ELEMENTS -Some Important Compounds Of Transition Elements
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  2. The basic character fo the transition metal monoxides follows the orde...

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  3. Which of the following oxides are basic ?

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  4. Following order is observed in oxidising power of certain ions : VO...

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  5. V2O5 reacts with alkalies as well as acids to give

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  6. Arrange the oxides of manganese according to increasing acidic strengt...

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  7. Potassium dichromate is prepared from

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  8. Which of the following reactions do not result in the preparation of p...

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  9. Which of the following compounds is used as the starting material for ...

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  10. Yellow coloured aquesous solution of sodium chromate changes to orange...

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  11. What happens when potassium iodide reacts with acidic solution of pota...

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  12. Acidified potassium dichromate reacts with potassium iodide and oxidie...

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  13. One mole of acidified K(2)Cr(2)O(7) on reaction with excess of KCl wil...

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  14. What would happen when a solution of potassium chromate is treated wit...

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  15. Identify the correct structure of dichromate ion.

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  16. In the dichromate anion (Cr2O7^(2-))

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  17. When MnO2 is fused with KOH and O2, what is the product formed and its...

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  18. The equation 3MnO4^(2-)+4H^(+)to2MnO4^(-)+MnO2+2H2O represents

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  19. Explain why does colour of KMnO(4) disappear when oxalic acid is added...

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  20. Complete the given reactions. (A) 2MnO4^(-)+H2O+I^(-)to2ul((i))+2O...

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