Phosphorus (white) catches fire in air and burns with the formation of white smoke the product formed is:
Correct answer: D. Both (A) & (B)
- A. Phosphoruss (iii) oxide
- B. Phosphoruss (v) oxide
- C. Phosphorus (ii) oxide
- D. Both (A) & (B)
Explanation
When white phosphorus burns in air, it undergoes a slow combustion reaction to form phosphorus (I) oxide, which is also known as phosphorus monoxide or phosphorus(I) oxide. This compound has the chemical formula P2O and is a white crystalline solid that sublimes at high temperatures. The balanced chemical equation for the reaction is:4P (s) + 5O2 (g) → 2P2O (s)In addition to phosphorus (I) oxide, white phosphorus also reacts with oxygen to form phosphorus (V) oxide, which is also known as phosphorus pentoxide or phosphoric anhydride. This compound has the chemical formula P4O10 and is a white crystalline solid that is highly hygroscopic. The balanced chemical equation for the reaction is:P4 (s) + 5O2 (g) → P4O10 (s)Therefore, the correct answer to the question is option D) Both (A) & (B).
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Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.
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