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MBD PUBLICATION-SOME P-BLOCK ELEMENTS-QUESTION BANK
- Potash alum is water soluble and ionises in aqueous solution to give :
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- Borax bead test is not given by :
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- Which is not correct ?
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- The molecules of aluminium chloride in vapour state :
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- The main factor responsible for weak acidic nature of B-F bonds in BF3...
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- Which is pure basic oxide ?
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- Oxides of group 13 elements are:
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- Which of the following cannot liberate H2 with acids ?
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- Which of the following shows variable valency ?
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- Melting point is highest for:
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- Pure H2S gas can be obtained by the action of water on :
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- Orthoboric acid when heated to red hot gives :
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- Boron was isolated by :
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- Boron differs from the other members of group 13 because it :
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- Boron compounds behave as Lewis acids because of their :
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- Which is amphoteric compound ?
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- Which does not react with water ?
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- The precious stone aquamarine is :
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- Which is amphoteric ?
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- Which of the following is not a Lewis acid ?
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