Q.1.
One mole of phosphide on rating with with excess of water gives.. [ IIT 1999]
-
25%
a) One mole of phosphine
-
50%
b) Two moles of phosphoric acid
-
25%
c) Two moles of phosphine
-
0%
d) One mole of phosphorus oxide
Q.2.
PH3 n the hydride of phosphate is ..
-
25%
a) Metallic
-
25%
b) Ionic
-
25%
c) Non metallic
-
25%
d) Covalent
Q.3.
Which shows maximum valency? [ CPMT 2003]
-
50%
a) Phosphorus
-
0%
b) Tin
-
50%
c) Antimony
-
0%
d) Bismuth
Q.4.
Among the trihalides of nitrogen which one is most basic? [ Pb CET 1997]
-
25%
a) NF3
-
0%
b) NCl3
-
75%
c) NI3
-
0%
d) NBr3
Q.5.
the basicity of phosphorous acid is .. [ Kerala MEE 2001]
-
0%
a) 1
-
75%
b) 2
-
25%
c) 3
-
0%
d) 4
Explanation
Q.6.
Sodium hexametaphosphate is known as .. [ EAMCET 2001]
-
25%
a) Calgon
-
25%
b) Permutit
-
0%
c) Natalite
-
50%
d) Nitrolim
Q.7.
The correct sequence of decrease in the bond angle of the following hydrides .. [ MP PET 2002]
-
60%
a) NH3 > PH3 >AsH3 > SbH3
-
20%
b) NH3 > AsH3 > PH3 >SbH3
-
0%
c) SbH3 > AsH3 > PH3 > NH3
-
20%
d) PH3 > NH3 >AsH3 >SbH3
Q.8.
PCl on hydrolysis gives [ DPMT 1996]
-
25%
a) HPO3
-
25%
b) POCl3
-
50%
c) H3PO3
-
0%
d) H3PO4