The p-Block Elements questions
1863 published questions with worked solutions.
- Pure N_2 can be obtained by:
- Nitric acid, whether dilute or concentrated:
- Nitrogen gas is absorbed by:
- Atomicity of phosphorus is:
- White phosphorus is:
- Red phosphorus is used in making:
- In H_3PO_3:
- The arrangement of oxygen atoms around the phosphorus atoms in P_4O_ 10 is:
- Bones (containing phosphorus residues) can appear to glow in the dark because:
- PCl_5 exists but NCl_5 does not because:
- Among the phosphatic fertilisers, superphosphate of lime is a mixture of Ca(H_2PO_4)_2 and:
- Phosphorus (white) burns spontaneously when exposed to air because:
- Concentrated nitric acid, on heating, decomposes to give:
- Correct statement about white phosphorus is:
- Which of the following is correct with reference to the protonic (Brønsted) acid-base behaviour of group 15 hydrides?
- A certain element forms a solid oxide which, when dissolved in water, forms an acidic solution. The element is:
- P_2O_5 when treated with cold water gives:
- Orthophosphoric acid is ionised in ....... steps.
- Nitric oxide is:
- P_4O_ 10 has short and long P–O bonds. The number of (short, terminal P = O) bonds is:
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