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OMEGA PUBLICATION-THE P-BLOCK ELEMENTS-MULTIPLE CHOICE QUESTIONS
- What are pseudohalogens ? Give example.
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- Bauxite containing chief impurities of oxides of silicon is called
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- Thermite is a mixture of
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- The first ionisation energy of silicon is lower than that of
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- Account for the following: The +2 oxidation state of lead is more stab...
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- Define catenation?
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- Silicon hydrides are called
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- C Cl4 is not hydrolysed but SiCl4 can be hydrolysed with water. Why ?
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- The formula of dry ice is ………………….. .
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- Which of the following is an ore of boron?
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- Compounds of Boron with hydrogen are known as
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- Diborane has
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- In B(2)H(6) , B-atom is
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- Orthoboric acid is
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- Boron halides are
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- Ammonia is, in general,
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- NH(3) can be prepared by
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- Boron trioxide can be reduced to boron with
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- In reaction BF(3) + 3LiBH(4) rarr 3LiF+ X, X is
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- Graphite is a good conductor of electricity because
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- The laughing gas is
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