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Define Ramsar Sites.
Concept: Biodiversity
Define Biodiversity.
Concept: Biodiversity
Define Eutrophication.
Concept: Biodiversity
Explain the rivet Popper hypothesis.
Concept: Biodiversity
Explain the chemiosmotic hypothesis for ATP synthesis.
Concept: Biodiversity
Study the graph given below and answer the following questions:
- Explain the ecological principle represented by the graph and write a mathematical expression for the same.
- What will happen if the slope of the line ‘b’ becomes steeper?
Concept: Importance of Biodiversity
The table given below shows the Area, Y-intercept and regression coefficient of the continents namely, Africa and Europe. Study the table carefully and answer the questions that follow:
| Africa | Europe | |
| Area (A) | 62,000 km sq. | 65,000 km sq. |
| Y-intercept | (C) 10 | 20 |
| Regression coefficient (Z) |
1 | 1 |
- Calculate the species richness (S) of each continent.
- Which of these continents shows a higher biodiversity?
- State any two factors that cause an increase in biodiversity.
Concept: Biodiversity
Name any two factors responsible for the loss of biodiversity in a geographical region.
Concept: Loss of Biodiversity
Samson and Dorothy surveyed two islands, ‘A’ and ‘B’. They recorded the relevant data in the following format in their research folder:
| Parameter | Island A | Island B | |
| (a) | Area (A) | 45 × 103 Km2 | 12 × 105 Km2 |
| (b) | Regression co-efficient (Z) | 1 | 1 |
| (c) | Y-intercept | 20 | 10 |
- Derive the species-richness for each island.
- Which island exhibits greater biodiversity? Support your answer with a reason.
Concept: Biodiversity
What do you mean by Biochemical Oxygen Demand (BOD)?
Concept: Environmental Issues >> Water Pollution
State any four measures to control noise pollution.
Concept: Environmental Issues >> Noise Pollution
Discuss the various In-situ and Ex-situ strategies for conservation of biodiversity.
Concept: Deforestation and Its Causes
The level of air pollution is very high in a city. Suggest any four measures which should be taken by the government to control it.
Concept: Prevention and Control of Air Pollution
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The scientists from a research institute collected samples of water from sewage pipes of two different cities, A and B. On analysis, the BOD value of the sample from city A was found to be 500 mg/L. The BOD value of the sample from city B was 200 mg/L. |
- Which one of the two cities needs a sewage treatment plant?
- Briefly discuss the steps involved in the treatment of sewage.
- What will be the effect of sewage treatment on the value of BOD?
Concept: Eutrophication
What type of magnetism is shown in the following alignment of magnetic moments?
Concept: Properties of Solids: Magnetic Properties
The complexion [Ni(CN)4]2- is:
Concept: Properties of Solids: Magnetic Properties
Explain why:
(i) Transition elements form coloured compounds.
(ii) Interhalogen compounds are more reactive than their constituent elements.
(iii) Cu+ is diamagnetic but Cu2+ is paramagnetic. (Z = 29)
Concept: Properties of Solids: Magnetic Properties
Name the law or principle to which the following observations confirm:
When 9650 coulombs of electricity is passed through a solution of copper sulphate, 3.175 g of copper is deposited on the cathode (at. wt. of Cu = 63.5).
Concept: Properties of Solids: Electrical Properties
A 2 molal solution of sodium chloride in water causes an elevation in the boiling point of water by 1.88 K. What is the value of Van’t Hoff factor? What does it signify? [Kb = 0.52 K kg mol−1]
Concept: Van’t Hoff Factor
Which one of the following compounds is diamagnetic and colourless?
Concept: Properties of Solids: Magnetic Properties
