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प्रश्न
Give reasons for the following:
Red phosphorus is less reactive than white phosphorus.
उत्तर
Presence of angular strain in any molecule can make it reactive. Such angular strain is found in the white phosphorous P4 molecule where the angles are only 60° making it more reactive. Also, white phosphorous is made of discrete tetrahedral P4 molecules while red phosphorus is consist of chains of P4 tetrahedra linked together. Hence, on the basis of these facts, it can be concluded that red phosphorus is less reactive than white phosphorus.
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संबंधित प्रश्न
Which allotrope of phosphorus is more reactive and why?
What happens when white phosphorus is heated with concentrated NaOH solution in an inert atmosphere of CO2?
Which allotrope of phosphorous is most stable?
At what temperature white phosphorus changes to red phosphorus?
What is the spontaneous ignition temperature of white phosphorous?
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.
Phosphorus has three allotropic forms — (i) white phosphorus (ii) red phosphorus and (iii) black phosphorus. Write the difference between white and red phosphorus on the basis of their structure and reactivity.
Which one of the following is formed (mainly) when red phosphorus is heated in a sealed tube at 803 K?
