1636: In a meeting, the map of a village was placed in such a manner that south-east becomes north, north-east becomes west and so on. What will south become ?
(A) North-east
(B) North
(C) North-west
(D) West
1637: Consider the following statements with reference to the Periodic Table of chemical elements :
I. lonisation potential gradually decreases along a period.
II. In a group of elements, electron affinity decreases as the atomic weight increases.
III. In a given period, electronegativity decreases as the atomic number increases.
Which of these statement(s) is/are correct ?
(a) I only
(b) II only
(c) I and III
(d) II and III
1638: Regarding the Indus Valley Civilization, consider the following statements:
1. It was predominantly a secular civilization and the religious element, though present, did not dominate the scene.
2. During this period, cotton was used for manufacturing textiles in India.
Which of the statements given above isl are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
1639: 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
1640: The water in an open pond remains cool even in hot summer because:
(a) Of continuous evaporation of water
(b) Water radiates heat more rapidly than the atmosphere
(c) Water absorbs heat less rapidly than the atmosphere
(d) Water absorbs heat more rapidly than the atmosphere