1236: Regarding the atom of a chemical element, the magnetic quantum number refers to
(a) orientation
(b) shape
(c) size
(d) spin
1237: How the body temperature is maintained?
(a) Due to temperature regulating mechanism located in the base of the brain
(b) Due to excessive intake of water
(c) Due to regular intake of foods
(d) Due to the constant flow of blood in the capillaries
1238: Consider the following ecosystems:
1. Taiga
2. Tropical evergreen
3. Tropical deciduous
4. Tundra
The correct sequence in decreasing order of the albedo values of these ecosystems is
(a) 1, 4, 3, 2
(b) 4, 1, 2, 3
(c) 4, 1, 3, 2
(d) 1, 4, 2, 3
1239: What is the role of ultraviolet (UV) radiation in the water purification systems?
1. It inactivates/kills the harmful micro-organism in water.
2. It removes all the undesirable odours from the water.
3. It quickens the sedimentation of solid particles, removes turbidity and improves the clarity of water.
Which of the statements given above is/are correct?
(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
1240: Which one of the following books of ancient India has the love story of the son of the founder of Sunga dynasty?
(a) Swapnavasavadatta
(b) Malavikagnirnitra
(c) Meghadoota
(d) Ratnavali