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Zinc oxide, white in colour at room temp...

Zinc oxide, white in colour at room temperature, acquires yellow colour on heating due to:

A

Zn being a transition element

B

paramagnetic nature of the compound

C

trapping of electrons at the site vacated by Oxide ions

D

Both A and B

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The correct Answer is:
C
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RESONANCE-SOLID STATE-Exercise -2 (Part-I)
  1. Which of the following are not correctly matched with the bonds found ...

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  2. Which of the following is not correct for ionic crystals

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  3. An element (atomic mass = 100 g//mol) having bcc structure has unit ce...

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  4. What is the nearest distance between two different layers in ABAB arra...

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  5. In a CCP lattice of X and Y,X atoms are present at the corners while Y...

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  6. You are given 6 identical balls. What is the maximum number of square ...

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  7. In a simple cubic lattice of anions, the side length of the unit cell ...

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  8. In a multi layered close-packed structure

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  9. In a compound,oxide ions are arranged in cubic close packing arrangeme...

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  10. Platinum crystallize in a face-centred cubic crystal with a unite cell...

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  11. Platinum crystallises in a face centered cube crystal with a unit cell...

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  12. Metallic gold crystallises in face centred cubic lattice with edge-len...

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  13. Which of the following statements is correct in the rock-salt structur...

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  14. The compound AB crystallizes in a cubic lattice in which both A and B ...

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  15. BaO has a rock-salt type structure. When subjected to high pressure, t...

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  16. A crystal of NaCl, which has sodium ionis and chloride ions missing fr...

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  17. In the Schootky defect

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  18. NaCl shows Schottky defects and AgCl Frenkel defects. Their electrical...

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  19. Zinc oxide, white in colour at room temperature, acquires yellow colou...

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