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IIT-JEE PREVIOUS YEAR (CHEMISTRY)-P BLOCK ELEMENTS-Objective Questions I
- Blue liquid which is formed at - 30^@ C by mixing of two gases is.
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- Thermodynamically most stable allotrope of phosphorus is :
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- Which of the following oxoacids of sulpher has -O-O- linkage ?
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- For H(3)PO(3) and H(3)PO(4) the correct choice is
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- Polyphosphates are used for softening agents because they
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- The number of S-S bonds, in sulpher trioxide trimer (S(3)O(9)) is :
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- Ammonia can be dried by :
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- Amongest H(2)O,H(2)S,H(2)Se and H(2)Te the one with highest boiling p...
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- The correct order of acidic strength is
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- The number of P-O-P bonds in cyclic metaphosphoric acid is.
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- One mole of calciium phosphide on reaction with excess water gives
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- Sodium thiosulphate is prepared by
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- There is no S-S bond in
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- Which one of the following is the strongest base ?
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- Among the trihalides of nitrogen, which is the least basic ?
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- Which of the followng oxides of nitrogen is a coloured gas ?
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- The bonds present in N(2)O(5) are .
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- A gas that cannot be collected over water is.
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- Ammonia gas can be dried by
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- Which of the following is incorrect statement ?
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