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Environmental Chemistry - 5
1.
9In human liver cancer is due to
a) Oxygen
b) Chloroform
c) Carbon dioxide
d) Methane
2.
Cl
2
+ H
2
O
a) HCl + O
2
b) HoCl + H++ Cl
c) HOCl + Cl
2
d) H
2
+ Cl
2
O
3.
Chromium (VI) is used in
a) Leather tanning
b) Cement industry
c) Water purification
d) Fertilizer industry
4.
COD of water can be determined directly by
a) Cr
2
O
3
b) Cr
2
q-2 Ions
c) MnO
4
-1Ions
d) Cr
2
O
24
Ions
5.
Colloidal material in raw water is removed by
a) Combustion
b) Chlorination
c) Purification
d) Coagulation
6.
Cracking of polyethylene at high temperature gives
a) Polymers
b) Monomers
c) Allotropes
d) Isomorphs
7.
Biosphere
a) 70.8
b) Chromium (VI)
c) Hepatitis
d) Environment
8.
Percentage of O
2
in air
a) Hepatitis
b) 21
c) 70.8
d) Chromium (VI)
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