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A compound is yellow when hot and white ...

A compound is yellow when hot and white when cold. The compound is:

A

`Al_(2)O_(3)`

B

`PbO`

C

`CaO`

D

`ZnO`

Text Solution

Verified by Experts

The correct Answer is:
D
It is a white powder which become yellow on heating due to change in the structure of lattice(due to cation excess defect ) but again turns white on cooling.
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RESONANCE-D BLOCK ELEMENTS-EXERCISE-I PART-II
  1. When K(4)[Fe(CN)(6)] is added to FeCl(3) , the complex compound formed...

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  2. FeCl(3).6H(2)O is actually:

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  3. A compound is yellow when hot and white when cold. The compound is:

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  4. On heating ZnXl(2).2H(2)O, the compounds obtained is:

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  5. When copper is placed in the atmosphere for sufficient time, a green c...

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  6. The solubility of silver bromide in hypo solution (excess) is due to ...

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  7. In dilute alkaline solution,MnO(4)^(-) changes to:

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  8. Cl2 gas is obtained by various reactions select the reactions from the...

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  9. CuSO(4) solution + lime is called:

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  10. The developer used in photography is an alkaline solution of:

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  11. When acidified solution of K(2)Cr(2)O(7) is shaken with aqeous solutio...

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  12. FeCl(3) dissolves in:

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  13. Which of the following compounds is used as the startingn material for...

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  14. Cr)(3) dissolved in aqueous NaOH to give:

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  15. The final product obtained for the following reaction is: KMnO(4)("ex...

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  16. When AgNo(3)(aq) reacts with excess of iodine, we get:

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  17. ZnO+CoOundersetto(Delta)X,Product X colour is:

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  18. The compound that gets oxidised even on exposure to atmosphere is:

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  19. Select correct statement(s).

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  20. The f-block elements of the periodic table contains those element in w...

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