2146: If water contracts on freezing, which of the following would happen?
(a) Icebergs will completely float on the surface of water
(b) Ice would become more dense
(c) Lakes would freeze from top to bottom
(d) Rocks will crack due to freezing or internal water
2147: In the cities of our country, which among the following atmospheric gases are normally considered in calculating the value of Air Quality Index?
1. Carbon dioxide
2. Carbon monoxide
3. Nitrogen dioxide
4. Sulfur dioxide
5. Methane
Select the correct answer using the code given below.
(a) 1, 2 and 3 only
(b) 2, 3 and 4 only
(c) 1, 4 and 5 only
(d) 1, 2, 3, 4 and 5
2148: Among the following, which one has the minimum population on the basis of data of Census of India, 2001 ?
(a) Puctucherry
(b) Sikkim
(c) Mizoram
(d) Chandigarh
2149: Assertion (A):
During the year 2001 - 02, the value of India's total exports declined, registering a negative growth of 2.17%.
Reason (R):
During the year 2001 - 02, negative growth in exports was witnessed in respect of iron and steel, coffee, textiles and marine products.
(a) Both A and R are individually true and R is the correct explanation of A
(b) Both A and R are individually true but R is NOT the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
2150: The length, breadth and height of a room are 1, b and h respectively. The perimeter of the ceiling expressed as a percentage of the total area of the four walls is
(a) 100 h
(b) 100/h
(c) h
(d) h/100