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Which of the following statements are FALSE? P. The boiling point of PH 3 is lower than that of NH 3 . Q. Red phosphorus is more reactive than white phosphorus. R. Phosphorus is sp 3 hybridised in PCl 3 . S. In the solid state, PCl 5 exists as a covalent solid

Which of the following statements are FALSE?

P. The boiling point of PH3 is lower than that of NH3.
Q. Red phosphorus is more reactive than white phosphorus.
R. Phosphorus is sp3 hybridised in PCl3.
S. In the solid state, PCl5 exists as a covalent solid

Grade:12th pass

1 Answers

Arun
25763 Points
2 years ago
Dear student
 
Option Q should be the answer as White Phosphorus is more reactive than red phosphorus.
 
White phosphorus has a tetrahedral basic unit where four phosphorus atoms arranged at the four corners of a tetrahedron are joined together by a total of six single bonds. This creates a very highly strained system which is unstable and very reactive. 
Red phosphorus has an amormous structure (only short range order, no long range one) and is therefore a lot more stable and less reactive eg it ignites in air at 240 deg Celsius whereas white Phosphorus at 30 deg Celsius
 
Hence statement 2 is false.
 
Hope it helps
 
Regards
Arun

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