Nutrition in Plants — Class 7 Science NCERT Solutions (Free)

Free step-by-step NCERT solutions for Class 7 Science chapter "Nutrition in Plants" — 8 important questions with detailed answers for CBSE board exam preparation.

TL;DR: Free step-by-step NCERT solutions for Class 7 Science chapter "Nutrition in Plants" — 8 important questions with detailed answers for CBSE board exam…

By Syllab.in · Updated Jun 14, 2026

Key Questions Covered:

Define photosynthesis.
What is the role of chlorophyll in photosynthesis?
Name the raw materials required for photosynthesis.
Why do plants require nitrogen for growth?
What is heterotrophic nutrition? Give one example.
Explain the process of photosynthesis in three steps.
+ 2 more questions in the full chapter

Solutions Summary:

Question	Status
Define photosynthesis.	✓ Solved
What is the role of chlorophyll in photosynthesis?	✓ Solved
Name the raw materials required for photosynthesis.	✓ Solved
Why do plants require nitrogen for growth?	✓ Solved
What is heterotrophic nutrition? Give one example.	✓ Solved
Explain the process of photosynthesis in three steps.	✓ Solved

Showing 6 of 8 questions

Q1: Define photosynthesis.

Photosynthesis is the process by which green plants manufacture their own food using sunlight, water, and carbon dioxide. Formula: 6CO₂ + 6H₂O + light energy → C₆H₁₂O₆ + 6O₂ This process occurs in the presence of chlorophyll in leaves.

Q2: What is the role of chlorophyll in photosynthesis?

Chlorophyll is the green pigment present in leaves that absorbs light energy from the sun. It enables the conversion of light energy into chemical energy. Without chlorophyll, photosynthesis cannot take place.

Q3: Name the raw materials required for photosynthesis.

The three raw materials needed for photosynthesis are: - Carbon dioxide (CO₂) from the air - Water (H₂O) from the soil - Sunlight (light energy)

Q4: Why do plants require nitrogen for growth?

Nitrogen is essential for plants because it is a component of proteins and chlorophyll. It helps in the growth of leaves and stems. Plants obtain nitrogen from soil in the form of nitrates.

Q5: What is heterotrophic nutrition? Give one example.

Heterotrophic nutrition is a mode of nutrition where organisms cannot manufacture their own food and depend on other organisms for nutrition. Examples: Animals, fungi, parasitic plants like Cuscuta (dodder).

Q6: Explain the process of photosynthesis in three steps.

Step 1 (Light reaction): Chlorophyll absorbs light energy which splits water molecules. Step 2: Energy converts CO₂ into glucose using the hydrogen from water. Step 3: Glucose is used as food for plant growth and oxygen is released as byproduct.

Showing 6 of 8 questions. Visit the full page for complete solutions.