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MBD PUBLICATION-p-BLOCK ELEMENTS-QUESTION BANK
- Calcium carbide when heated with nitrogen forms:
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- Which property of white phosphorus is common to red P ?
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- Which hydride is most stable ?
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- Which is a poison ?
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- NH4Cl is used to clean metal surfaces because:
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- In smoke screens calcium phosphide is used, because it:
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- Ammonia on heating with carbon dioxide under pressure gives:
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- Dilute HNO3 reacts with limestone to yield:
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- CaN pellets are coated with calcium silicate because:
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- Basic oxide is:
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- Fluorapatite is a mineral of:
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- Which of the following is correct, with reference to protonic acids:
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- The single electron in 2p-orbitals of nitrogen atom proves:
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- Vortex rings in air are formed by:
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- NaOH can absorb:
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- Which sulphide is insoluble in yellow ammonium sulphide ?
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- Which statement is not correct ?
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- Hydrolysis of PI3 yields:
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- In smoke screens calcium phosphide is used, because it:
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- The oxidation state of nitrogen in NH4NO3 is:
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