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Grade: 12th pass

                        

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

one year ago

Answers : (1)

Arun
25122 Points
							
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
one year ago
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