Phosphoric acid is a weak acid and its basicity is____________________?
A. 1
B. 3
C. zero
D. 2
Chemistry Mcqs
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