The nitrogen cycle can be broken down into…..types of reactions.
a) two
b) three
c) four
d) five
Explanation: 1. Nitrogen fixation, 2. Nitrification, 3. Denitrification and 3. Ammonification
Which of the following is correct regarding nitrogen cycle?
a) N2 is most abundant nutrient for plant
b) N2 cycle is a sedimentary
c) the major reservoir of nitrogen is atmosphere
d) all of them
Nitrogen can be fixed in ……ways.
a) two
b) three
c) four
d) five
Explanation: 1. Atmospheric, 2. Industrial and 3. Biological fixation
Which of the following agent/s is/are responsible for the atmospheric fixation of nitrogen?
a) air
b) lightening
c) water
d) all of these
Explanation: nitrogen combines with oxygen to produce various kind of oxides.
Which of the following process fixes nitrogen in industrial process?
a) Haber process
b) Salvay process
c) Half-cell reaction
d) Contact process
Explanation: The Haber Process is used in the manufacturing of ammonia from nitrogen and hydrogen,
Which of the following bacteria are free livings in the soil, fixing nitrogen independently of other organisms?
a) Azotobacter
b) Clostridium
c) Rhizobium
d) both a and b
Explanation: Rhizobium forms symbiotic associations with roots of leguminous plants
