WorksheetsXII CHEMISTRY UNIT 3 PART 9
Total questions: 10
Worksheet time: 5mins
In phosphorous trioxide four phosphorous atoms lie at the corners of a tetrahedron and------ oxygen atoms along the edges.
a.5
b.4
c.6
d.8
In P4O10 the terminal coordinate P-O bond length is
a. 123 pm
b.125 pm
c.145 pm
d.143 pm
The molecular formula of hypophosphorous acid is
a.H4P2O4
b.H4P2O6
c.H3PO2
d.H3PO3
Which one is Ortho phosphrous acid?
a.H3PO4
b.H3PO3
c.H4P2O7
d.H2PO2
Which one is the preparation of Hypo phosphoric acid?
a. 2P+ 2O 2 + 2H2O →H4P2O6
b. P4O6+ 6 H2O → 4H3PO3
c. P4+ 6H2O → 3H3PO2+PH3
d. 2H3PO 3 →H4P2O7+H2O
Oxidation state of ”P” in H3PO4 is
a. +2
b.+5
c.+6
d.+7
Elements belonging group 16 are called
a. Halogens
b. Chalcogens
c. Inert gases
d. pnictogens
Which one is a gas in Oxygen family?
a. S
b. Se
c. Te
d.O2
Oxygen family except “O” other elements are ------in nature.
a. liquid
b. semi solids
c. solids
d. none
The electronic configuration of Polonium is
a.[He]2s2 2p4
b.[Ne]3s2 3p4
c.[Kr]4d10 5s2 5p4
d.[Xe] 4f14 5d10 6s2 6p4
