2566: Which one of the following touches the boundary of Iran?
(a) Aral Sea
(b) Lake Balkash
(c) Lake Baikal
(d) Caspian Sea
2567: When iron rusts, the weight:
(a) Increases
(b) Decreases
(c) Remains the same
(d) First increases then decreases
2568: A ball bounces higher at high altitudes than in plains. This is because:
(a) The pressure on higher altitudes is lower than that in plains
(b) Downward pull due to gravity is less at higher altitudes
(c) The rarefied air offers less resistance to the ball
(d) You become more energetic at hills, so greater the force applied, higher goes the ball
2569: The Alpine vegetation in the western Himalayas is found only up to a height of 3000 metres, while in the eastern Himalayas it is found up to a height of 4000 metres,. The reason for this variation in the same mountain range is that
(a) eastern Himalayas are higher than western Himalayas
(b) eastern Himalayas are nearer to the Equator and sea coast than western Himalayas
(c) eastern Himalayas get more monsoon rainfall than the western Himalayas
(d) eastern Himalayan rocks are more fertile than the western Himalayan rocks
2570: If x and y are positive integers such that (3x + 7y) is a multiple of 11, then which of the followings are divisible by 11?