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Rationalise the statements and give chem...

Rationalise the statements and give chemical reactions. (iii) Lead is known not to form an iodide`Pbl_4`

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The correct Answer is:
`Pb^(4+)` ion is highly oxidising and `I^-` is highly reducing in nature. So `PbCl_4` does not exist.
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A N EXCEL PUBLICATION-THE P-BLOCK ELEMENTS-QUESTION BANK
  1. Rationalise the statements and give chemical reactions. (i) Lead (II) ...

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  2. Rationalise the statements and give chemical reactions. (ii) Lead (IV)...

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  3. Rationalise the statements and give chemical reactions. (iii) Lead is ...

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  4. Suggest a reason why B-F bond length in BF3 (130 pm) and BF4^(-) (143 ...

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  5. Define dipole moment. The dipole moment of BF3 is zero. Why?

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  6. What happens when Borax is heated

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  7. What happens when Boric acid is added to water

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  8. What happens when Al treated with dilute NaOH

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  9. What happens when BF3 reacted with NH3

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  10. Explain the reaction Si is heated with methyl chloride at high tempera...

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  11. Explain the reaction SiO2 is treated with HF

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  12. Explain the reaction CO is heated with ZnO

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  13. Explain the reaction Hydrated alumina is mixed with aqueous NaOH

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  14. Give reasons (i) Con.HNO3 can be transported in Al containers

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  15. Give reasons (ii) A mixture of Al pieces and dilute NaOH is used to op...

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  16. Give reasons (iii) Graphite is used as a lubricant

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  17. Give reasons (iv) Diamond is used as an abrasive

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  18. Give reasons (v) Al alloys are used to make aircraft body

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  19. Give reasons (vi) Aluminium utensils cannot be kept in water overnight

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  20. Give reasons (vii) Aluminium wire is used to make transmission cables.

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