NEET · Biology · STD 12 - 12. ecosystem

Match List I with List II :
List I List II
A. Decomposition I. Accumulation of dark coloured amorphous colloidal substance
B. Detritus II. Release of inorganic nutrients by the activity of microbes in soil
C. Mineralisation III. Breaking down of complex organic matter into inorganic substances
D. Humification IV. Dead remains of plants and animals including faecal matter

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

Verified Solution

Answer & Solution

Correct Answer

(B) A-III, B-IV, C-II, D-I

Step-by-step Solution

Detailed explanation

(B) A-III, B-IV, C-II, D-I
Decomposition is the process of breaking down complex organic matter into inorganic substances like carbon dioxide, water, and nutrients
Detritus constitutes the dead remains of plants and animals, including faecal matter, which serves as the raw material for decomposition.
Mineralisation is the process by which microbes further degrade humus to release inorganic nutrients into the soil.
Humification leads to the accumulation of a dark-coloured, amorphous, colloidal substance called humus, which is highly resistant to microbial action
Thus, the correct matching is A-III, B-IV, C-II, D-I.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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Match List \(I\) with List \(II\).

List \(I\) (Spectral Lines of Hydrogen for transitions from)	List \(II\) (Wavelengths (\(nm\)))
\(A\) \(n_2=3 \text { to } n_1=2\)	\(I\) \(410.2\)
\(B\) \(n_2=4 \text { to } n_1=2\)	\(II\) \(434.1\)
\(C\) \(n_2=5 \text { to } n_1=2\)	\(III\) \(656.3\)
\(D\) \(n_2=6 \text { to } n_1=2\)	\(IV\) \(486.1\)

Choose the correct answer from the options given below:

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List I	List II
A. Decomposition	I. Accumulation of dark coloured amorphous colloidal substance
B. Detritus	II. Release of inorganic nutrients by the activity of microbes in soil
C. Mineralisation	III. Breaking down of complex organic matter into inorganic substances
D. Humification	IV. Dead remains of plants and animals including faecal matter