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MBD PUBLICATION-SOME P-BLOCK ELEMENTS-QUESTION BANK
- 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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- When a solution of sodium hydroxide is added in excess to the solution...
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- The two type of bonds present in B2H6 are covalent and :
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- Which metal is powdered, suspended in oil and used as paint ?
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- Which of the following does not belong to group 13 ?
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- The product formed in the reaction,BCl3+H2O rarr Product is:
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- The structure of BF3 is :
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- The composition of mica is :
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