821: Cloudy nights are warmer compared to clear cloudless nights, because clouds
(a) prevent cold waves from the sky from descending on Earth
(b) reflect back heat given off by Earth
(c) produce heat and radiate it towards Earth
(d) absorb heat from the atmosphere and send it towards Earth
822: The population growth rate in Kerala is the lowest among major Indian states. Which one of the following is the most widely accepted reason for this ?
(a) Kerala has made the highest investment in family planning
(b) Kerala has the highest literacy rate in India
(c) Kerala has invested heavily in promoting literacy and public health and placed high priority on social policies
(d) The population pyramid in Kerala has relatively fewer women in the reproductive age-group
823: Consider the following countries
1. China
2. France
3. India
4. Israel
5. Pakistan
Which among the above are Nuclear Weapons States as recognized by the Treaty on the Non-Proliferation of Nuclear Weapons, commonly known as Nuclear Non-Proliferation Treaty (NPT)?
(a) 1 and 2 only
(b) 1, 3, 4 and 5 only
(c) 2, 4 and 5 only
(d) 1, 2, 3, 4 and 5
824: With reference to Indian history, which of the following is/are the essential elementy elements of the feudal system?
1. A very strong centralized political authority and a very weak provincial or local political authority
2. Emergence of administrative structure based on control and possession of land
3. Creation of lord-vassal relationship between the feudal lord and his overlord
Select the correct answer using the code given below.
(a) 1 and 2 only
(b) 2 and 3 only
(c) 3 only
(d) 1, 2 and 3
825: Which one of the areas marked as A, B, C and D in the given figure of the cyclone, witnesses heavy torrential short-duration rainfall accompanied by thunderstorms ?
(a) A
(b) B
(c) C
(d) D