1.Which
of the following is responsible for ozone depletion?
a.Oxygen
b.Freon or Freon12
c.Nitrogen
d.None of the above
2.Which
of the following is a green house gas emitted from crop field?
a.Nitrous oxide
b.Nitrogen
c.Hydrogen
peroxide
d.None of the above
3.In
which of the following layer of atmosphere ozone is concentrated ?
a.Exosphere and Stratosphere
b.Troposphere and Exosphere
c.Stratosphere and Troposphere
d.Mesosphere and Troposphere
4.Which
of the following gas has highest concentration in atmosphere?
a.Nitrogen
b.Helium
c.Oxygen
d.Carbon dioxide
5.Which of the following is an air pollutant and
forms acid rain?
a.Sulphur dioxide /Nitrous oxide
b.Nitrogen
c.Oxygen
d.Hydrogen
6.Which
of the following is a denitrifying bacterium?
a.Pseudomonas
b.Ammonium nitrate
c.Nitrobacter
d.None of the above
7.Which
of the following is an aerobic free living nitrogen fixing bacterium?
a.Azotobacter
b.Rhizobium
c.Frankia
d.None of the above
8.Which
of the following is an anaerobic free living nitrogen fixing bacterium?
a.Clostridum
bAzotobacter
c.Rhizobium
d.Frankia
9.Which
of the following organism is associated with leguminous plants in formation of root nodules?
a.Frankia
b.Clostridium
c.Azotobacter
d.Rhizobacter
10.Which
of the following is a symbiotic nitrogen
fixing bacterium?
a.Rhizobium
b.Clostridium
c.Azotobacter
d.Frankia
Important Botany questions for IAS-PCS , given by Prof. B.K. Verma (Ex. HOD. Allahabad University)
More sets To come----
ment For any queries.
