2546: At one of the places in India, if you stand on the seashore and watch the sea, you will find that the sea water recedes from the shore line a few kilometres and comes back to the shore, twice a day, and you can actually walk on the sea floor when the water recedes. This unique phenomenon is seen at
(a) Bhavnagar
(b) Bheemunipatnam
(c) Chandipur
(d) Nagapattinam
2547: In India, during the last decade the total cultivated land for which one of the following crops has remained more or less stagnant ?
(a) Pulses
(b) Oilseeds
(c) Rice
(d) Sugarcane
2548: Four wires of same material and of dimensions as under as stretched by a load of same magnitude separately. Which one of them will be elongated maximum ?
(a) Wire of 1 m length and 2 mm diameter
(b) Wire of 2 m length and 2 mm diameter
(c) Wire of 3 m length and 1.5 mm diameter
(d) Wire of 1 m length and 1 mm diameter
2549: The correct sequence of different layers of the atmosphere from the surface of the Earth upwards is
(a) Troposphere, Stratosphere, Ionosphere, Mesosphere
(b) Stratosphere, Troposphere, Ionosphere, Mesosphere
(c) Troposphere, Stratosphere, Mesosphere, Ionosphere
(d) Stratosphere, Troposphere, Mesosphere, Ionosphere
2550: Diamond and Emerald contain:
(a) Carbon and silicon
(b) Carbon and zinc
(c) Silicon, aluminium and beryllium
(d) Carbon and calcium