The nitrogen molecules present in air can be converted into nitrates and nitrites by:

  • A
    a biological process of nitrogen-fixing bacteria present in soil
  • B
    a biological process of carbon-fixing factors present in soil
  • C
    any of the industries manufacturing nitrogenous compounds
  • D
    the plants used as cereal crops in the field

Explore More

Similar Questions

Write the names of three processes in which oxygen is used and one process by which it returns to the atmosphere.

Lichens are called pioneer colonisers of bare rock. How can they help in the formation of soil?

Rainfall patterns depend on

Why do not lichens occur in Delhi whereas they commonly grow in Manali or Darjeeling?

In what forms is water found on the Earth's surface? Describe in brief.

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial
For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free
For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo