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Social Science (087) — AI-generated practice question

AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.

Q1. [1] medium exam-ready
Which of the following crops, when grown in rotation, is most beneficial for maintaining soil health because of its root nodule bacteria? ((A)) Wheat ((B)) Rice ((C)) Maize ((D)) Gram
  1. A Arhar (tur)
  2. B Maize
  3. C Moong
  4. D Cotton
Generated by claude-sonnet-4-6 · 2026-06-26 13:30 · grounding rag
Model Answer

(C) Moong

Pulses like moong are leguminous crops that fix atmospheric nitrogen through root nodule bacteria, thereby restoring soil fertility when grown in rotation with other crops.

Source: Major Crops, Chapter 4

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Explanation

The textbook states that leguminous crops (pulses) "help in restoring soil fertility by fixing nitrogen from the air" and "are mostly grown in rotation with other crops." Among the given options, Moong is a pulse (leguminous crop). Arhar (tur) is also a pulse but the textbook specifically says all pulses except arhar fix nitrogen. Maize and Cotton are not leguminous. So Moong is the correct answer.

Previous-year CBSE Grade 10 board exam questions, organised by subject and chapter, each with a model answer — free to read and print.