Question

Match the decomposition processes with their functions:

List I	List II
A. Leaching --- IV. Water soluble inorganic nutrients go down into the soil and get precipitated B. Catabolism --- III. Bacterial and Fungal enzymes degrade detritus into simpler inorganic substances C. Humification --- II. Accumulation of a colloidal dark coloured amorphous substance D. Mineralization --- I. Degradation of humus by microbes to release inorganic nutrients	IV. Water soluble inorganic nutrients go down into the soil and get precipitated III. Bacterial and Fungal enzymes degrade detritus into simpler inorganic substances II. Accumulation of a colloidal dark coloured amorphous substance I. Degradation of humus by microbes to release inorganic nutrients

• A. A-IV, B-III, C-I, D-II
• B. A-II, B-IV, C-I, D-III
• C. A-II, B-III, C-IV, D-I
• D. A-IV, B-III, C-II, D-I

Hint:

Remember: Leaching moves nutrients downward; Catabolism uses enzymes to break down detritus; Humification forms dark colloidal substance; Mineralization releases inorganic nutrients from humus.

Answer 1

The Correct Option is D

Step 1: Concept
Decomposition processes in soil and their functions.

Step 2: Meaning
Understanding the roles of leaching, catabolism, humification, and mineralization in the breakdown of organic matter and nutrient cycling.

Step 3: Analysis
Leaching (A): Water-soluble inorganic nutrients move downward through the soil and get precipitated --- matches IV.
Catabolism (B): Bacterial and fungal enzymes break down detritus into simpler inorganic substances --- matches III.
Humification (C): Formation of stable, dark-coloured colloidal amorphous compounds --- matches II.
Mineralization (D): Microbes degrade humus to release inorganic nutrients --- matches I.

Step 4: Conclusion
Correct matching: A-IV, B-III, C-II, D-I. Final Answer: (D)