The process of mineralization by microorganisms helps in the release of:
Show Hint
- inorganic nutrients from humus.
- both organic and inorganic nutrients from detritus.
- organic nutrients from humus.
- inorganic nutrients from detritus and formation of humus.
The Correct Option is A
Solution and Explanation
Step 2: This releases inorganic nutrients such as nitrogen, phosphorus, and potassium.
Step 3: These nutrients are made available to plants through this process.
Top Questions on Ecosystem
Student to attempt either option (A) or (B).
(A) Identify the type of pyramid given below and write two identifying features of such a pyramid:
OR
(B)
(i) Construct an ideal pyramid of energy when 10,00,000 Joules of sunlight is available.
(ii) Mention the energy obtained by the fourth level of this pyramid.}
- Differentiate between Net primary productivity and Gross primary productivity in an ecosystem.
- Analyse the following ecosystems and discuss, which will be more productive in terms of primary productivity:
A young forest, a natural old forest, a shallow polluted lake. - Assertion (A): Natural ecosystems perform fundamental life support services, without life would cease.
Reason (R): The dependence on the ecosystems is poorly understood and they can provide life enhancing services.- AP EAPCET - 2025
- Botany
- Ecosystem
We do not clean natural ponds or lakes, whereas an aquarium or a swimming pool needs to be cleaned regularly. Why?
Questions Asked in CBSE CLASS XII exam
Bittu and Chintu were partners in a firm sharing profit and losses in the ratio of 4:3. Their Balance Sheet as at 31st March, 2024 was as
On $1^{\text {st }}$ April, 2024, Diya was admitted in the firm for $\frac{1}{7}$ share in the profits on the following terms:
- New profit sharing ratio between Bittoo, Chintoo and Diya will be $3:3:1$.
- Fixed Assets were found to be overvalued by ₹ 1,40,000.
- Creditors were paid ₹ 4,20,000 in full settlement.
- Diya brought proportionate capital and ₹ 5,60,000 as her share of goodwill premium by cheque.
Prepare Revaluation Account and Partners' Capital Accounts.
- CBSE CLASS XII - 2025
- Profit and Loss Account
- A battery of emf \( E \) and internal resistance \( r \) is connected to a rheostat. When a current of 2A is drawn from the battery, the potential difference across the rheostat is 5V. The potential difference becomes 4V when a current of 4A is drawn from the battery. Calculate the value of \( E \) and \( r \).
- CBSE CLASS XII - 2025
- Current electricity
- Calculate the value of the current passing through the battery in the given circuit diagram.
- CBSE CLASS XII - 2025
- Current electricity
(a) Calculate the standard Gibbs energy (\(\Delta G^\circ\)) of the following reaction at 25°C:
\(\text{Au(s) + Ca\(^{2+}\)(1M) $\rightarrow$ Au\(^{3+}\)(1M) + Ca(s)} \)
\(\text{E\(^\circ_{\text{Au}^{3+}/\text{Au}} = +1.5 V, E\)\(^\circ_{\text{Ca}^{2+}/\text{Ca}} = -2.87 V\)}\)
\(\text{1 F} = 96500 C mol^{-1}\)- CBSE CLASS XII - 2025
- Electrochemistry
Define the following:
(i) Cell potential
(ii) Fuel Cell- CBSE CLASS XII - 2025
- Electrochemistry