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Which two elements of group-13 form amph...

Which two elements of group-13 form amphoteric hydroxides?

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Al and Ga
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CHHAYA PUBLICATION-SOME p-BLOCK ELEMENTS-EXERCISE (VERY SHORT-TYPE QUESTIONS)
  1. Which two elements of group-13 form amphoteric hydroxides?

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  2. What are the two stable natural isotopes of boron?

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  3. Which of the group-13 elements has the most stable + 1 oxidation state...

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  4. Which of the Gr-13 elements forms only covalent compounds?

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  5. The melting point of boron is very high, even though it is a non-metal...

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  6. Which acid is obtained when an aqueous solution of borax is acidified ...

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  7. Which are called boranes?

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  8. What is the correct structural formula of borax?

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  9. What happens when orthoboric acid is heated till red hot ?

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  10. What is inorganic benzene? Why is it called so?

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  11. What is the common oxidation state of group-13 elements?

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  12. Write down the chemical composition of the coloured compound obtained ...

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  13. Arrange boron halides in decreasing strength as Lewis acid.

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  14. How can boric acid form polymer?

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  15. Explain why BF6^(3-) does not exist.

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  16. What is duralurnin? Mention its uses.

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  17. Cone nitric acid can be stored in an aluminium vessel-why?

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  18. Borazine is more reactive than benzene-why?

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  19. Some metals are extracted from their oxides by reducing with aluminium...

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  20. Which out of C Cl4 and SiCl4 reacts with water and why?

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