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प्रश्न
Which allotrope of sulphur is thermally stable at room temperature ?
उत्तर
The rhombic allotrope of sulphur (α-suphur) is thermally stable at room temperature.
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संबंधित प्रश्न
Out of white phosphorus and red phosphorus, which one is more reactive and why?
Give reasons for the following:
Red phosphorus is less reactive than white phosphorus.
Answer the following question.
Write the disproportionation reaction of H3PO3.
Which allotrope of phosphorous is most stable?
At what temperature white phosphorus changes to red phosphorus?
All elements of Group 15 show allotropy except ______.
Which of the following elements does not show allotropy?
Which of the following is correct for P4 molecule of white phosphorus?
(i) It has 6 lone pairs of electrons.
(ii) It has six P–P single bonds.
(iii) It has three P–P single bonds.
(iv) It has four lone pairs of electrons.
Which of the following statements are correct?
(i) All the three N – O bond lengths in \[\ce{HNO3}\] are equal.
(ii) All P – Cl bond lengths in \[\ce{PCl5}\] molecule in gaseous state are equal.
(iii) \[\ce{P4}\] molecule in white phosphorus have angular strain therefore white phosphorus is very reactive.
(iv) \[\ce{PCl}\] is ionic in solid state in which cation is tetrahedral and anion is octahedral.
Which one of the following is formed (mainly) when red phosphorus is heated in a sealed tube at 803 K?
