1. With reference to turtle species found in Indian waters, which of the following are listed as ‘Vulnerable’ on the IUCN Red List of Threatened Species?
- Olive Ridley
- Leatherback
- Loggerhead
- Hawksbill
- Green turtle
Select the correct answer using the codes given below:
[A] Only 1 & 3
[B] Only 1, 2 & 3
[C] Only 2, 3 & 4
[D] Only 1, 3, 4 & 5
Show Answer
Correct Answer: B [Only 1, 2 & 3]
Notes:
In Indian waters, Olive Ridley, Leatherback, and Loggerhead turtles are listed as ‘Vulnerable’ on the IUCN Red List. Hawksbill is ‘Critically Endangered’, while Green turtle is ‘Endangered’. All these species are protected under Schedule I of the Wildlife Protection Act, 1972.
2. Consider the following applications:
- Railway ballasting
- Road construction
- Water treatment
- Soil conditioning
Which of the above applications can be carried out using steel slag?
[A] Only 1 and 2
[B] Only 1, 2 and 3
[C] Only 2, 3 and 4
[D] 1, 2, 3 and 4
Show Answer
Correct Answer: D [1, 2, 3 and 4]
Notes:
Steel slag is versatile: it serves as railway ballast and road aggregate due to its density and abrasion resistance, is used in water treatment for neutralizing acidic discharges, and as a soil conditioner in agriculture (e.g., tea and coffee plantations) to improve soil properties. Thus, all four applications listed can be carried out using steel slag.
3. Consider the following pairs:
- Transform boundary – The San Andreas Fault in California
- Divergent boundary – Mid-Atlantic Ridge
- Oceanic-continental convergent plate boundary – the Washington-Oregon coastline of the United States
- Oceanic-oceanic convergence – Mariana Trench
How many pairs given above are correctly matched?
[A] Only 1 pair
[B] Only 2 pairs
[C] Only 4 pairs
[D] Only 3 pairs
Show Answer
Correct Answer: C [Only 4 pairs]
Notes:
All four pairs are correctly matched. The San Andreas Fault is a classic transform boundary; the Mid-Atlantic Ridge is a divergent boundary; the Washington-Oregon coastline exemplifies oceanic-continental convergence (Juan de Fuca Plate subducts beneath North America); and the Mariana Trench is formed by oceanic-oceanic convergence (Pacific Plate under Philippine Plate).
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