Property | Gross Primary Productivity (GPP) | Net Primary Productivity (NPP) |
---|---|---|
Definition | Total amount of organic matter produced by producers via photosynthesis. | Amount of organic matter remaining after respiratory losses by producers. |
Energy Used in Respiration | Includes energy used in respiration. | Excludes energy used in respiration. |
Formula | GPP = NPP + Respiration | NPP = GPP - Respiration |
Represents | It represents the total energy captured. | It represents the energy available to herbivores and decomposers. |
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.}
We do not clean natural ponds or lakes, whereas an aquarium or a swimming pool needs to be cleaned regularly. Why?
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:
Prepare Revaluation Account and Partners' Capital Accounts.
(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\(^\circ_{\text{Au}^{3+}/\text{Au}} = +1.5 V, E\)\(^\circ_{\text{Ca}^{2+}/\text{Ca}} = -2.87 V\)}\)
\(\text{1 F} = 96500 C mol^{-1}\)
Define the following:
(i) Cell potential
(ii) Fuel Cell