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How much space is empty in a hexagonal c...

How much space is empty in a hexagonal closed packed solid?

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ln a hengonal close packed solid , 26% space remains empty.
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CHHAYA PUBLICATION-MODEL QUESTION PAPER -Answer the following question (set-2)
  1. Why is Frenkel defect not found in pure alkali metal halides?

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  2. Calculate packing efficiency of bee lattice

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  3. How much space is empty in a hexagonal closed packed solid?

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  4. What makes the crystal of KCl sometimes appear pink and how?

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  5. Write down van't Hoff equation of osmotic pressure.

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  6. The osmotic pressure of an aqueous solution of urea is 500 mm Hg at 42...

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  7. How many grams of chlorine can be produced by the electrolysis of molt...

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  8. Write two differences between potential difference and EMF.

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  9. In a conductive cell, at 298K, the resistance of 0.05M NaOH solution i...

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  10. What is the use of platinum foil in the hydrogen electrode?

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  11. Why is copper extracted by self reduction? Write down the chemical rea...

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  12. What is thermite mixture?

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  13. With the same d-orbital configuration, Cr^(2+) is a reducing agent whi...

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  14. Write down disproportionation reaction of Cu^+ ion

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  15. Why do lanthanides show usually +3 oxidation state?

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  16. Why do transition elements show coloured compounds?

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  17. Why do transition metals have high enthalpy of alomisation?

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  18. Write the structure of chlorophenylmethane.

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  19. Identify A to D

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  20. Why does chloroform preserve in dark coloured bottle?

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