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List any four techniques where the principle of ex-situ conservation of biodiversity has been employed.
Concept: Conservation of Biodiversity
Identify ‘a’ and ‘b’ in the figure given below representing proportionate number of major vertebrate taxa.
Concept: Biodiversity
Why should we conserve biodiversity ? How can we do it?
Concept: Conservation of Biodiversity
'in-situ' Conservation can help endangered/threatened species. Justify the statement.
Concept: Conservation of Biodiversity
Name and describe any three causes of bio-diversity losses.
Concept: Conservation of Biodiversity
Explain the concept of "co-extinction" by taking two examples.
Concept: Loss of Biodiversity
List any three major causes of loss of biodiversity.
Concept: Loss of Biodiversity
Enlist two criteria that are used to identify a region for maximum protection as 'Biodiversity hotspots'.
Concept: Loss of Biodiversity
"Forests provide intangible benefits to us." Explain by taking three different areas, how.
Concept: Loss of Biodiversity
The IUCN Red Data List (2004) in the last 500 years documents the extinction of nearly 784 species including ______.
Concept: Loss of Biodiversity
What is ferromagnetism?
Concept: Properties of Solids: Magnetic Properties
What type of magnetism is shown by a substance if magnetic moments of domains are arranged in same direction?
Concept: Properties of Solids: Magnetic Properties
An element crystallizes in a f.c.c. lattice with a cell edge of 250 pm. Calculate the density if 300 g of this element contains 2 × 1024 atoms.
Concept: Calculations Involving Unit Cell Dimensions
Calculate the freezing point of solution when 1.9 g of MgCl2 (M = 95 g mol−1) was dissolved in 50 g of water, assuming MgCl2 undergoes complete ionization.
(Kf for water = 1.86 K kg mol−1)
Concept: Colligative Properties and Determination of Molar Mass >> Depression of Freezing Point
Out of 1 M glucose and 2 M glucose, which one has a higher boiling point and why?
Concept: Colligative Properties and Determination of Molar Mass >> Elevation of Boiling Point
What happens when the external pressure applied becomes more than the osmotic pressure of solution?
Concept: Colligative Properties and Determination of Molar Mass >> Osmosis and Osmotic Pressure
When 2.56 g of sulphur was dissolved in 100 g of CS2, the freezing point lowered by 0.383 K. Calculate the formula of sulphur (Sx).
(Kf for CS2 = 3.83 K kg mol−1, Atomic mass of sulphur = 32 g mol−1]
Concept: Colligative Properties and Determination of Molar Mass >> Depression of Freezing Point
Blood cells are isotonic with 0.9% sodium chloride solution. What happens if we place blood cells in a solution containing
(i) 1.2% sodium chloride solution?
(ii) 0.4% sodium chloride solution?
Concept: Colligative Properties and Determination of Molar Mass >> Osmosis and Osmotic Pressure
What is the formula of a compound in which the element Y forms ccp lattice and atoms of X occupy 1/3rd of tetrahedral voids?
Concept: Crystal Lattices and Unit Cells
What is meant by positive deviations from Raoult's law? Give an example. What is the sign of ∆mixH for positive deviation?
Concept: Vapour Pressure of Liquid Solutions >> Vapour Pressure of Liquid- Liquid Solutions
