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Group 5A and Group 6A elements - 1
1.
Among group VA of periodic table phosphorus, arsenic and _____________ have alltropes.
a) Hydrogen
b) Sulphur
c) Antimony
d) Polonium (Po)
2.
___________ is known as langhing gas.
a) Carbon disulphide
b) Benzene sulphonic acid
c) Dinitrogenoxide (N
2
O)
d) V
2
O
2
Vanadium pentaoxide
3.
Decomposition of NO
2
in to NO & O
2
takes place at _________ C
o
.
a) 620C
o
b) 615C
o
c) 625C
o
d) 630C
o
4.
____________________ process is used for the Manu facing of nitric oxide (No).
a) Carbon disulphide
b) Brickland & Eydes
c) Benzene sulphonic acid
d) V
2
O
2
Vanadium pentaoxide
5.
Aqua vegia is prepared by mixing one volume of Conc. HNO
2
with _____ volumes of Conc. HCl.
a) 0, Hcl
b) 3, Hcl
c) 1, Hcl
d) 2, Hcl
6.
Bone ash is an important source of ___________.
a) Polonium (Po)
b) PH
3
c) PH
3
Phosphoric
d) Phosphorus
7.
Phosphorus acid decomposes into orthophosphoric acid and __________ gas.
a) PH
5
b) PH
2
c) PH
3
d) PH
1
8.
All the elements of group VIA are non-metals except ________ which is a radioactive element.
a) Polonium (Po)
b) Phosphorus
c) 3, Hcl
d) PH
3
Phosphoric
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