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

  • A
    Any of the industries manufacturing nitrogenous compounds
  • B
    $A$ biological process of carbon fixing factor present in soil
  • C
    The plants used as cereal crops in field
  • D
    $A$ biological process of nitrogen fixing bacteria present in soil

Explore More

Similar Questions

Water is essential for life. Why? State three points.

Describe the role of photosynthesis and respiration in the carbon cycle.

How are $CFCs$ harmful for the environment and living beings?

Topsoil contains the following:

Why are root nodules useful for the plants?

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