Phosphoric acid is a weak acid and its basicity is____________________?
Phosphoric acid is a weak acid and its basicity is____________________?
A. 1
B. 3
C. zero
D. 2
Group VA and VIA Elements
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P2O5 is a hygroscopic powder which sublimes at______________?
P2O5 is a hygroscopic powder which sublimes at______________?A. 260°C
B. 360°C
C. 630°C
D. 620°C -
Phosphorous acid upon thermal decomposition yields phosphoric acid and____________________?
Phosphorous acid upon thermal decomposition yields phosphoric acid and____________________?A. Phosphine
B. Phosphorus
C. Water
D. Phosphorus pentoxide -
Acetic anhydride can be obtained by treating ethyl alcohol with___________________?
Acetic anhydride can be obtained by treating ethyl alcohol with___________________?A. P2O5
B. H2SO4
C. Both A and B
D. PCI5 -
Allotropic form of phosphorus that is poisonous is___________________?
Allotropic form of phosphorus that is poisonous is___________________?A. White
B. Red
C. Black
D. Violet -
Phosphorus is a Greek word and it means_________________?
Phosphorus is a Greek word and it means_________________?A. Light bearing
B. Fire
C. Impure
D. Tetrahedral -
Which of the following will give phosphoric acid one reaction with water_________________?
Which of the following will give phosphoric acid one reaction with water_________________?A. PCI5
B. P2O3
C. P2O5
D. All of the above -
SO3 is not absorbed in water directly because__________________?
SO3 is not absorbed in water directly because__________________?A. Reaction is exothermic
B. It is insoluble in water
C. Dilute acid is produced
D. All of above -
Compounds of nitrogen and phosphorus are mostly________________?
Compounds of nitrogen and phosphorus are mostly________________?A. ionic
B. covalent
C. polar
D. all varieties are possible -
Which of the following is different with respect to physical appearance ?
Which of the following is different with respect to physical appearance ?A. Arsenic
B. Phosphorus
C. Antimony
D. Bismuth