4046: Which one of the following is an artificial lake ?
(a) Kodaikanal (Tamil Nadu)
(b) Kolleru (Andhra Pradesh)
(c) N ainital (Uttarakhand)
(d) Renuka (Himachal Pradesh)
4047: Solution of washing soda in water is:
(a) Acidic
(b) Basic
(c) Neutral
(d) Sour
4048: Local self-government can be best explained as an exercise in
(a) Federalism
(b) Democratic decentralization
(c) Administrative delegation
(d) Direct democracy
4049: There is a concern over the increase in harmful algal blooms in the seawaters of India. What could be the causative factors for this phenomenon?
1. Discharge of nutrients from the estuaries.
2. Run-off from the land during the monsoon.
3. Upwelling in the seas.
Select the Correct answer from the codes given below:
(a) 1 only
(b) 1 and 2 only
(c) 2 and 3 only
(d) 1, 2 and 3
4050: A person walks 10 km north from a point, then he moves 20 km south and subsequently he turns 20 km north. He again turns 20 km south and then moves 10 km east. How far is he from the starting point?
(a) 10 km
(b) 20 km
(c) 30 km
(d) None of the above