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AAKASH INSTITUTE-THE P-BLOCK ELEMENTS-Try yourself
- BF(3)+Hfto
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- give one method of preparation of Na(2)B(4)O(7)
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- Give hydrolysis product of trihalides of boron family.
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- 2ln(s)+2NaOH(aq)+2H(2)Oto
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- What happens when aluminium is treated with conc. HNO(3)?
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- Give oxidation state of all boron atom in borax.
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- Give chemical composition of glassy bead.
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- Give colour of bead produced when glassy bead reacts with CuO
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- How would you prepare boric anhydride from boric acid?
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- How would you prepare tetraboric acid from boric acid?
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- Name anhydride of boron family which is highly unstable.
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- Name a compound which is artifical Lapis-Lazuli.
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- What is the percentage of sulphur in ultramarine?
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- Give one use of alum.
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- name an aluminium compound that can be used in manufacture of dyes, dr...
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- Which one of the following is hardest compound of boron ?
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- Give one use of borax.
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- The order of catenation power is
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- Why is+2oxidiation state of lead more stable than +4 oxidation state?
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- Why m.p. and b.p. of group 14 elements are higher in comparison to gro...
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