Q.1
One mole of phosphide on rating with with excess of water gives.. [ IIT 1999]
  • a) One mole of phosphine
  • b) Two moles of phosphoric acid
  • c) Two moles of phosphine
  • d) One mole of phosphorus oxide
Q.2
PH3 n the hydride of phosphate is ..
  • a) Metallic
  • b) Ionic
  • c) Non metallic
  • d) Covalent
Q.3
Which shows maximum valency? [ CPMT 2003]
  • a) Phosphorus
  • b) Tin
  • c) Antimony
  • d) Bismuth
Q.4
Among the trihalides of nitrogen which one is most basic? [ Pb CET 1997]
  • a) NF3
  • b) NCl3
  • c) NI3
  • d) NBr3
Q.5
the basicity of phosphorous acid is .. [ Kerala MEE 2001]
  • a) 1
  • b) 2
  • c) 3
  • d) 4
Q.6
Sodium hexametaphosphate is known as .. [ EAMCET 2001]
  • a) Calgon
  • b) Permutit
  • c) Natalite
  • d) Nitrolim
Q.7
The correct sequence of decrease in the bond angle of the following hydrides .. [ MP PET 2002]
  • a) NH3 > PH3 >AsH3 > SbH3
  • b) NH3 > AsH3 > PH3 >SbH3
  • c) SbH3 > AsH3 > PH3 > NH3
  • d) PH3 > NH3 >AsH3 >SbH3
Q.8
PCl on hydrolysis gives [ DPMT 1996]
  • a) HPO3
  • b) POCl3
  • c) H3PO3
  • d) H3PO4
0 h : 0 m : 1 s